Task: Schema-Matching (source dataset: HXD)

Task: 
Please identify the matching columns between Table A and Table B. For each column in Table A, specify the corresponding column in Table B. If a column in A has no corresponding column in Table B, you can map it to null. Represent each column mapping using a pair of column headers in a list, i.e., [Table A Column, Table B column or null]. Provide the mapping for each column in Table A and return all mappings in a list.

No explanation and return the matching columns in a structured JSON format: {"column_mappings": <a list of column pairs>}.

TableA:
| Snapshot Date       | Country   | Country Code   |   DTM Round | Date                | State   | State_Pcode   | LGA         | LGA Pcode   | Ward              | CODs_Ward_Pcode   | SiteID   | Site Name         |   Longitude |   Latitude | Site Type        | Site Classification   | Site Management Agency   | SMA type   | Registration Activity   | WASH Support   | CCCM Support   | CCCM_Organization    | HEALTH Support   | SHELTER Support   | NFI Support    | FOOD Support   | PROTECTION Support   | EDUCATION Support   | LIVELIHOOD Support   | PSS SUPPORT   | PSS_ORGANIZATION    | Land Ownership    | Most Common Type of Shelter   |   Number of Households |   Number of Individuals |   Boys (<1) |   Girls (<1) |   Boys (1 - 5 y) |   Girls (1 - 5 y) |   Boys 6to12y |   Girls 6to12y |   Boys 13to17y |   Girls 13to17y |   Men (18 - 59 y) |   Women (18 - 59 y) |   (Elderly men 60+ y) |   (Elderly women 60+ y) | Have IDPs been displaced previously   | Reason for displacement of Majority   | Natural Hazard Risks   | Intended Area of Return   | Reasons to Return Home   | Reasons NOT to Return Home   | % HH living outside (no shelter)   | % HH living in EmS   | % HH living in makeshift/self-made shelter   | % HH living indoors (solid walls)   | % HH have access to electricity   | % HH have access to safe cooking facilities   | % HH have private living area   | % HH have mosquito nets   | Most needed NFI   | Location of site main water source   | Main drinking water source   | Avg amount of water available /day/person   | Is drinking water potable   | Complaints about drinking water quality   | Condition of most of the toilets   |   # of functioning toilets | Main garbage disposal    | Garbage and solid waste problem   | Availability of hand-washing station   | Hygiene promotion campaign   | Evidence of open defecation   | Access to food   | Access to market near from the site   | Frequency of food distribution   | Most common source for obtaining food   | Screening for malnutrition   | Most health problem   | Regular access to medicine   | Access to health facility   | Location of health facilities   | Main provider of health facilities   | Access to education services   | Location of education facilities   | % of children attending school   | Occupation of majority of IDPs   |   # of HH with source of income | Access to income generating activities   | Livestock on site   | IDPs have access to land for cultivation   | Most trusted source of Info   | Main topic community is requesting info   | Serious problem due to lack information   |
|:--------------------|:----------|:---------------|------------:|:--------------------|:--------|:--------------|:------------|:------------|:------------------|:------------------|:---------|:------------------|------------:|-----------:|:-----------------|:----------------------|:-------------------------|:-----------|:------------------------|:---------------|:---------------|:---------------------|:-----------------|:------------------|:---------------|:---------------|:---------------------|:--------------------|:---------------------|:--------------|:--------------------|:------------------|:------------------------------|-----------------------:|------------------------:|------------:|-------------:|-----------------:|------------------:|--------------:|---------------:|---------------:|----------------:|------------------:|--------------------:|----------------------:|------------------------:|:--------------------------------------|:--------------------------------------|:-----------------------|:--------------------------|:-------------------------|:-----------------------------|:-----------------------------------|:---------------------|:---------------------------------------------|:------------------------------------|:----------------------------------|:----------------------------------------------|:--------------------------------|:--------------------------|:------------------|:-------------------------------------|:-----------------------------|:--------------------------------------------|:----------------------------|:------------------------------------------|:-----------------------------------|---------------------------:|:-------------------------|:----------------------------------|:---------------------------------------|:-----------------------------|:------------------------------|:-----------------|:--------------------------------------|:---------------------------------|:----------------------------------------|:-----------------------------|:----------------------|:-----------------------------|:----------------------------|:--------------------------------|:-------------------------------------|:-------------------------------|:-----------------------------------|:---------------------------------|:---------------------------------|--------------------------------:|:-----------------------------------------|:--------------------|:-------------------------------------------|:------------------------------|:------------------------------------------|:------------------------------------------|
| 2021-07-30 00:00:00 | Nigeria   | NGA            |          38 | 2021-07-04 00:00:00 | ADAMAWA | NG002         | NUMAN       | NG002016    | IMBURU            | NG002016004       | AD_H352  | IMBURU            |     12.0184 |    9.48811 | host communities | Host Communities      | no                       | none       | no                      | no             | no             | No CCCM Organization | no               | no                | no             | no             | no                   | yes                 | no                   | no            | No PSS ORGANIZATION | private building  | Host family house             |                     75 |                     525 |           6 |            6 |                9 |                12 |            33 |             39 |             59 |              65 |               135 |                 139 |                     9 |                      13 | no                                    | communal clashes                      | none                   | place of origin           | rebuild personal shelter | I want to go back            | none                               | none                 | >75%                                         | 51%_75%                             | 51%_75%                           | 25%_50%                                       | none                            | 51%_75%                   | Blankets/Mats     | on-site (<10 minutes)                | hand pumps                   | 10-15ltr                                    | yes                         | no                                        | not so good (not hygienic)         |                          0 | burning                  | no                                | none                                   | no                           | yes                           | no               | yes                                   | irregular                        | cultivated                              | no                           | malaria               | no                           | yes                         | on-site (> 3 km)                | government                           | yes                            | onsite                             | 25% -50%                         | farming                          |                              13 | yes                                      | yes                 | yes                                        | religious leader              | distribution                              | no                                        |
| 2021-07-30 00:00:00 | Nigeria   | NGA            |          38 | 2021-06-26 00:00:00 | TARABA  | NG035         | LAU         | NG035010    | ABBERE II         | NG035010002       | TR_H126  | NASARAWA          |     11.6188 |    9.24409 | host communities | Host Communities      | no                       | none       | no                      | no             | no             | No CCCM Organization | no               | no                | no             | no             | no                   | no                  | no                   | no            | No PSS ORGANIZATION | private building  | rented house                  |                      3 |                      15 |           0 |            0 |                0 |                 1 |             2 |              2 |              5 |               3 |                 1 |                   1 |                     0 |                       0 | no                                    | insurgency                            | none                   | place of origin           | rebuild personal shelter | I want to go back            | none                               | none                 | none                                         | >75%                                | 25%_50%                           | 51%_75%                                       | 51%_75%                         | <25%                      | Blankets/Mats     | off-site (>10 minutes)               | hand pumps                   | 10-15ltr                                    | no                          | yes                                       | good (hygienic)                    |                          3 | burning                  | no                                | none                                   | no                           | no                            | no               | yes                                   | never                            | none                                    | no                           | malaria               | yes                          | yes                         | off-site (< 3 km)               | government                           | yes                            | offsite                            | <25%                             | farming                          |                               3 | yes                                      | yes                 | yes                                        | friends, neighbors and family | situation in areas of origin              | no                                        |
| 2021-07-30 00:00:00 | Nigeria   | NGA            |          38 | 2021-06-29 00:00:00 | ADAMAWA | NG002         | MADAGALI    | NG002010    | BABEL             | NG002010001       | AD_H199  | DRIF              |     13.6129 |   10.8621  | host communities | Host Communities      | no                       | none       | yes                     | yes            | no             | No CCCM Organization | yes              | yes               | yes            | yes            | yes                  | yes                 | yes                  | no            | No PSS ORGANIZATION | private building  | individual house              |                     60 |                     330 |           3 |            4 |               29 |                36 |            32 |             38 |             56 |              53 |                33 |                  44 |                     0 |                       2 | no                                    | insurgency                            | none                   | place of origin           | rebuild personal shelter | I want to go back            | none                               | none                 | 25%_50%                                      | 51%_75%                             | none                              | none                                          | none                            | 25%_50%                   | Blankets/Mats     | on-site (<10 minutes)                | hand pumps                   | 10-15ltr                                    | yes                         | no                                        | good (hygienic)                    |                         59 | burning                  | no                                | none                                   | no                           | no                            | yes onsite       | yes                                   | irregular                        | cultivated                              | no                           | malaria               | yes                          | yes                         | on-site (< 3 km)                | government                           | yes                            | onsite                             | 51% - 75%                        | farming                          |                              48 | yes                                      | yes                 | yes                                        | friends, neighbors and family | distribution                              | yes                                       |
| 2021-07-30 00:00:00 | Nigeria   | NGA            |          38 | 2021-06-23 00:00:00 | TARABA  | NG035         | SARDAUNA    | NG035011    | GEMBU 'B'         | NG035011002       | TR_H153  | OBASANJO QUARTERS |     11.2567 |    6.72013 | host communities | Host Communities      | no                       | none       | yes                     | no             | no             | No CCCM Organization | yes              | yes               | yes            | no             | yes                  | yes                 | no                   | no            | No PSS ORGANIZATION | private building  | Host family house             |                     20 |                     107 |           1 |            0 |                3 |                 3 |             6 |              3 |             11 |              17 |                28 |                  31 |                     2 |                       2 | no                                    | communal clashes                      | none                   | place of origin           | improved security        | I want to go back            | none                               | none                 | none                                         | >75%                                | none                              | 51%_75%                                       | >75%                            | none                      | mattress          | off-site (>10 minutes)               | protected well               | 10-15ltr                                    | yes                         | no                                        | not so good (not hygienic)         |                         18 | no waste disposal system | yes                               | none                                   | no                           | no                            | no               | yes                                   | never                            | cultivated                              | yes                          | fever                 | yes                          | yes                         | off-site (> 3 km)               | government                           | yes                            | offsite                            | 51% - 75%                        | farming                          |                               0 | yes                                      | yes                 | yes                                        | aid worker                    | other relief assistance                   | no                                        |
| 2021-07-30 00:00:00 | Nigeria   | NGA            |          38 | 2021-07-06 00:00:00 | BORNO   | NG008         | DAMBOA      | NG008007    | AZUR/MULTE/FORFOR | NG008007003       | BO_H404  | MULIMARI          |     12.6842 |   11.0831  | host communities | Host Communities      | no                       | none       | no                      | yes            | no             | No CCCM Organization | no               | no                | no             | no             | no                   | no                  | no                   | no            | No PSS ORGANIZATION | private building  | Host family house             |                    148 |                     895 |          27 |           30 |               70 |                79 |            86 |             98 |             53 |              77 |               153 |                 199 |                    11 |                      12 | no                                    | insurgency                            | none                   | place of origin           | I don't want to go back  | no access to initial place   | none                               | none                 | <25%                                         | >75%                                | none                              | <25%                                          | none                            | <25%                      | kitchen sets      | on-site (<10 minutes)                | unprotected well             | 5-10ltr                                     | yes                         | no                                        | not so good (not hygienic)         |                          0 | burning                  | yes                               | none                                   | no                           | yes                           | no               | no                                    | never                            | cultivated                              | no                           | malaria               | yes                          | yes                         | off-site (< 3 km)               | government                           | yes                            | offsite                            | 51% - 75%                        | farming                          |                              16 | yes                                      | yes                 | yes                                        | local leader/community leader | situation in areas of origin              | yes                                       |
| 2021-07-30 00:00:00 | Nigeria   | NGA            |          38 | 2021-07-04 00:00:00 | YOBE    | NG036         | GULANI      | NG036008    | GULANI            | NG036008008       | YB_H192  | GALA CIROMA       |     11.6886 |   10.7277  | host communities | Host Communities      | no                       | none       | yes                     | no             | no             | No CCCM Organization | yes              | yes               | yes            | yes            | yes                  | yes                 | yes                  | no            | No PSS ORGANIZATION | Public/Government | Host family house             |                      7 |                      46 |           2 |            2 |                2 |                 2 |             2 |              4 |              3 |               3 |                 9 |                  15 |                     1 |                       1 | yes                                   | insurgency                            | flood                  | place of origin           | access to land           | I want to go back            | none                               | <25%                 | <25%                                         | <25%                                | none                              | 25%_50%                                       | <25%                            | 25%_50%                   | mosquito nets     | on-site (<10 minutes)                | piped water supply           | >15ltr                                      | yes                         | no                                        | not so good (not hygienic)         |                          5 | burning                  | yes                               | yes                                    | yes                          | no                            | yes offsite      | yes                                   | irregular                        | distribution                            | yes                          | malaria               | yes                          | yes                         | on-site (< 3 km)                | government                           | yes                            | onsite                             | 51% - 75%                        | agro-pastoralism                 |                               4 | yes                                      | yes                 | yes                                        | local leader/community leader | access to services                        | no                                        |
| 2021-07-30 00:00:00 | Nigeria   | NGA            |          38 | 2021-07-04 00:00:00 | TARABA  | NG035         | ARDO - KOLA | NG035001    | JAURO YINU        | NG035001004       | TR_H002  | KOFAI I           |     11.3184 |    8.91108 | host communities | Host Communities      | no                       | none       | yes                     | no             | no             | No CCCM Organization | no               | no                | no             | no             | yes                  | no                  | no                   | no            | No PSS ORGANIZATION | Private Building  | Host family house             |                    101 |                     703 |          22 |           20 |               35 |                54 |            38 |             43 |             50 |              80 |               123 |                 209 |                    18 |                      11 | yes                                   | insurgency                            | none                   | none stay here            | I don't want to go back  | security available           | none                               | none                 | none                                         | >75%                                | <25%                              | >75%                                          | >75%                            | 25%_50%                   | kitchen sets      | off-site (>10 minutes)               | water truck                  | >15ltr                                      | yes                         | no                                        | not so good (not hygienic)         |                         18 | no waste disposal system | yes                               | none                                   | no                           | yes                           | no               | yes                                   | irregular                        | cultivated                              | no                           | malaria               | no                           | yes                         | off-site (< 3 km)               | government                           | yes                            | offsite                            | 25% -50%                         | farming                          |                              40 | yes                                      | yes                 | yes                                        | local leader/community leader | distribution                              | no                                        |
| 2021-07-30 00:00:00 | Nigeria   | NGA            |          38 | 2021-07-04 00:00:00 | ADAMAWA | NG002         | NUMAN       | NG002016    | NUMAN I           | NG002016006       | AD_H354  | BAMTATO           |     12.0338 |    9.45723 | host communities | Host Communities      | no                       | none       | no                      | no             | no             | No CCCM Organization | no               | no                | no             | yes            | no                   | yes                 | no                   | no            | No PSS ORGANIZATION | private building  | Host family house             |                     59 |                     413 |           9 |           11 |                8 |                 9 |            34 |             43 |             47 |              50 |                73 |                  83 |                    23 |                      23 | no                                    | communal clashes                      | none                   | place of origin           | rebuild personal shelter | I want to go back            | none                               | none                 | 51%_75%                                      | >75%                                | 51%_75%                           | 25%_50%                                       | none                            | 25%_50%                   | mattress          | on-site (<10 minutes)                | hand pumps                   | 10-15ltr                                    | yes                         | no                                        | not so good (not hygienic)         |                          0 | burning                  | no                                | none                                   | no                           | yes                           | no               | yes                                   | irregular                        | cultivated                              | no                           | malaria               | no                           | yes                         | on-site (< 3 km)                | government                           | yes                            | onsite                             | 25% -50%                         | farming                          |                              11 | yes                                      | yes                 | yes                                        | friends, neighbors and family | distribution                              | no                                        |
| 2021-07-30 00:00:00 | Nigeria   | NGA            |          38 | 2021-07-09 00:00:00 | ADAMAWA | NG002         | SHELLENG    | NG002017    | BODWAI            | NG002017002       | AD_H364  | DALWA             |     12.0482 |    9.97057 | host communities | Host Communities      | no                       | none       | no                      | no             | no             | No CCCM Organization | no               | no                | no             | no             | no                   | no                  | no                   | no            | No PSS ORGANIZATION | private building  | Host family house             |                     10 |                      60 |           2 |            2 |                2 |                 4 |             4 |              4 |              4 |               6 |                10 |                  16 |                     2 |                       4 | no                                    | insurgency                            | none                   | place of origin           | improved security        | I want to go back            | none                               | none                 | none                                         | >75%                                | 25%_50%                           | 25%_50%                                       | <25%                            | <25%                      | kitchen sets      | on-site (<10 minutes)                | hand pumps                   | 10-15ltr                                    | yes                         | no                                        | not so good (not hygienic)         |                          9 | burning                  | no                                | none                                   | no                           | yes                           | yes onsite       | yes                                   | irregular                        | cultivated                              | no                           | fever                 | no                           | yes                         | on-site (< 3 km)                | local clinic                         | yes                            | onsite                             | 51% - 75%                        | farming                          |                               3 | yes                                      | yes                 | yes                                        | friends, neighbors and family | situation in areas of origin              | no                                        |
| 2021-07-30 00:00:00 | Nigeria   | NGA            |          38 | 2021-07-05 00:00:00 | GOMBE   | NG016         | AKKO        | NG016001    | GARKO             | NG016001002       | GM_H009  | GONNA/DUNDADO     |     11.1871 |   10.2656  | host communities | Host Communities      | no                       | none       | yes                     | no             | no             | No CCCM Organization | yes              | yes               | yes            | yes            | yes                  | yes                 | yes                  | no            | No PSS ORGANIZATION | private building  | rented house                  |                     51 |                     357 |          14 |           13 |               29 |                26 |            37 |             32 |             42 |              38 |                59 |                  60 |                     3 |                       4 | no                                    | insurgency                            | fire                   | place of origin           | to join family members   | I want to go back            | none                               | none                 | none                                         | >75%                                | <25%                              | 25%_50%                                       | <25%                            | 51%_75%                   | kitchen sets      | on-site (>10 minutes)                | water truck                  | >15ltr                                      | yes                         | no                                        | not so good (not hygienic)         |                          0 | no waste disposal system | yes                               | yes_but_no_soap/water_inside           | no                           | yes                           | yes offsite      | yes                                   | irregular                        | cultivated                              | no                           | malaria               | yes                          | yes                         | on-site (< 3 km)                | government                           | yes                            | onsite                             | 51% - 75%                        | farming                          |                              12 | yes                                      | yes                 | yes                                        | religious leader              | situation in areas of origin              | no                                        |

TableB:
|   DTM Round | State   | State_Pcode   | LGA             | LGA Pcode   | Ward                | Ward Pcode   | SiteID   | Site Name          |   Longitude |   Latitude |   Number of Households |   Number of Individuals |
|------------:|:--------|:--------------|:----------------|:------------|:--------------------|:-------------|:---------|:-------------------|------------:|-----------:|-----------------------:|------------------------:|
|          26 | BORNO   | NG008         | KAGA            | NG008014    | BENISHEIKH          | NG008014002  | BO_S101  | MAGISTRATE         |     12.4984 |    11.8079 |                    474 |                    4674 |
|          26 | BORNO   | NG008         | JERE            | NG008013    | GONGULONG           | NG008013005  | BO_S212  | KESSA KURA         |     13.192  |    11.9181 |                    535 |                    2704 |
|          26 | BORNO   | NG008         | JERE            | NG008013    | DUSUMAN             | NG008013004  | BO_S229  | BOLORIN BURIN      |     13.2325 |    11.8657 |                     88 |                     414 |
|          26 | BORNO   | NG008         | DAMBOA          | NG008007    | DAMBOA              | NG008007005  | BO_S223  | POLICE BARRACK     |     12.7612 |    11.1612 |                     26 |                     105 |
|          26 | BORNO   | NG008         | JERE            | NG008013    | BALE GALTIMARI      | NG008013002  | BO_S301  | AJAJARI CAMP       |     13.1818 |    11.7959 |                     11 |                      63 |
|          26 | BORNO   | NG008         | JERE            | NG008013    | NGUDAA/ADDAMARI     | NG008013008  | BO_S179  | NGUD/ KHADDAMARI   |     13.2221 |    11.949  |                     40 |                     153 |
|          26 | BORNO   | NG008         | MONGUNO         | NG008024    | MONGUNO             | NG008024007  | BO_S177  | VERTINARY          |     13.607  |    12.67   |                   1629 |                    9208 |
|          26 | BORNO   | NG008         | MAIDUGURI M. C. | NG008021    | LAMISULA/JABBA MARI | NG008021010  | BO_S286  | PAMPAS STREET CAMP |     13.1553 |    11.8613 |                     56 |                     311 |
|          26 | BORNO   | NG008         | MAIDUGURI M. C. | NG008021    | BOLORI  I           | NG008021001  | BO_S307  | ALI CROSS HOUSE 1  |     13.1095 |    11.8871 |                     13 |                      57 |
|          26 | BORNO   | NG008         | MONGUNO         | NG008024    | MONGUNO             | NG008024007  | BO_S099  | NRC 1 & 2          |     13.6241 |    12.6662 |                    519 |                    4112 |



source_headers: DTM Round
State
State_Pcode
LGA
LGA Pcode
Ward
CODs_Ward_Pcode
Longitude
Latitude
Number of Households
Number of Individuals
SiteID
Site Name
target_headers: DTM Round
State
State_Pcode
LGA
LGA Pcode
Ward
Ward Pcode
Longitude
Latitude
Number of Households
Number of Individuals
SiteID
Site Name
column_mappings: DTM Round
DTM Round
State
State
State_Pcode
State_Pcode
LGA
LGA
LGA Pcode
LGA Pcode
Ward
Ward
CODs_Ward_Pcode
Ward Pcode
Longitude
Longitude
Latitude
Latitude
Number of Households
Number of Households
Number of Individuals
Number of Individuals
SiteID
SiteID
Site Name
Site Name
output: {"column_mappings": [["Snapshot Date", null], ["Country", null], ["Country Code", null], ["DTM Round", "DTM Round"], ["Date", null], ["State", "State"], ["State_Pcode", "State_Pcode"], ["LGA", "LGA"], ["LGA Pcode", "LGA Pcode"], ["Ward", "Ward"], ["CODs_Ward_Pcode", "Ward Pcode"], ["SiteID", "SiteID"], ["Site Name", "Site Name"], ["Longitude", "Longitude"], ["Latitude", "Latitude"], ["Site Type", null], ["Site Classification", null], ["Site Management Agency", null], ["SMA type", null], ["Registration Activity", null], ["WASH Support", null], ["CCCM Support", null], ["CCCM_Organization", null], ["HEALTH Support", null], ["SHELTER Support", null], ["NFI Support ", null], ["FOOD Support", null], ["PROTECTION Support", null], ["EDUCATION Support", null], ["LIVELIHOOD Support", null], ["PSS SUPPORT", null], ["PSS_ORGANIZATION", null], ["Land Ownership", null], ["Most Common Type of Shelter", null], ["Number of Households", "Number of Households"], ["Number of Individuals", "Number of Individuals"], ["Boys (<1)", null], ["Girls (<1)", null], ["Boys (1 - 5 y)", null], ["Girls (1 - 5 y)", null], ["Boys 6to12y", null], ["Girls 6to12y", null], ["Boys 13to17y", null], ["Girls 13to17y", null], ["Men (18 - 59 y)", null], ["Women (18 - 59 y)", null], ["(Elderly men 60+ y)", null], ["(Elderly women 60+ y)", null], ["Have IDPs been displaced previously", null], ["Reason for displacement of Majority", null], ["Natural Hazard Risks", null], ["Intended Area of Return", null], ["Reasons to Return Home", null], ["Reasons NOT to Return Home", null], ["% HH living outside (no shelter)", null], ["% HH living in EmS", null], ["% HH living in makeshift/self-made shelter", null], ["% HH living indoors (solid walls)", null], ["% HH have access to electricity", null], ["% HH have access to safe cooking facilities", null], ["% HH have private living area", null], ["% HH have mosquito nets", null], ["Most needed NFI", null], ["Location of site main water source", null], ["Main drinking water source", null], ["Avg amount of water available /day/person", null], ["Is drinking water potable", null], ["Complaints about drinking water quality", null], ["Condition of most of the toilets", null], ["# of functioning toilets", null], ["Main garbage disposal", null], ["Garbage and solid waste problem", null], ["Availability of hand-washing station", null], ["Hygiene promotion campaign", null], ["Evidence of open defecation", null], ["Access to food", null], ["Access to market near from the site", null], ["Frequency of food distribution", null], ["Most common source for obtaining food", null], ["Screening for malnutrition", null], ["Most health problem", null], ["Regular access to medicine", null], ["Access to health facility", null], ["Location of health facilities", null], ["Main provider of health facilities", null], ["Access to education services", null], ["Location of education facilities", null], ["% of children attending school", null], ["Occupation of majority of IDPs", null], ["# of HH with source of income", null], ["Access to income generating activities", null], ["Livestock on site", null], ["IDPs have access to land for cultivation", null], ["Most trusted source of Info", null], ["Main topic community is requesting info", null], ["Serious problem due to lack information", null]]}