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       |   DTM Round | Country   | Country Code   | State_Pcode   | State   | LGA Pcode   | LGA        | Ward Pcode   | Ward            | SiteID   | Site Name       |   Longitude |   Latitude | Site Type        | Site Classification   | Site Management Agency   | SMA Type   | Registration Activity   | WASH Support   | HEALTH Support   | SHELTER-NFI Support   | FOOD Support   | PROTECTION Support   | EDUCATION Support   | LIVELIHOOD Support   | 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 (6 - 17 y) |   Girls (6 - 17 y) |   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   |
|:--------------------|------------:|:----------|:---------------|:--------------|:--------|:------------|:-----------|:-------------|:----------------|:---------|:----------------|------------:|-----------:|:-----------------|:----------------------|:-------------------------|:-----------|:------------------------|:---------------|:-----------------|:----------------------|:---------------|:---------------------|:--------------------|:---------------------|:-----------------|:------------------------------|-----------------------:|------------------------:|------------:|-------------:|-----------------:|------------------:|------------------:|-------------------:|------------------:|--------------------:|----------------------:|------------------------:|:--------------------------------------|:--------------------------------------|:-----------------------|:--------------------------|:-------------------------|:-------------------------------------------|:-----------------------------------|:---------------------|:---------------------------------------------|:------------------------------------|:----------------------------------|:----------------------------------------------|:--------------------------------|:--------------------------|:------------------|:-------------------------------------|:-----------------------------|:--------------------------------------------|:----------------------------|:------------------------------------------|:-----------------------------------|---------------------------:|:-------------------------|:----------------------------------|:---------------------------------------|:-----------------------------|:------------------------------|:-----------------|:--------------------------------------|:---------------------------------|:----------------------------------------|:-----------------------------|:----------------------|:-----------------------------|:----------------------------|:--------------------------------|:-------------------------------------|:-------------------------------|:-----------------------------------|:---------------------------------|:---------------------------------|--------------------------------:|:-----------------------------------------|:--------------------|:-------------------------------------------|:------------------------------|:------------------------------------------|:------------------------------------------|
| 2021-01-28 00:00:00 |          34 | Nigeria   | NG             | NG002         | ADAMAWA | NG002021    | YOLA SOUTH | NG002021008  | NAMTARI         | AD_H498  | KASUWAN KATAKO  |     12.3901 |    9.27388 | Host Communities | Host Communities      | no                       | None       | yes                     | yes            | yes              | yes                   | no             | no                   | yes                 | no                   | Private Building | individual house              |                    104 |                     814 |          16 |           18 |               30 |                38 |                74 |                 89 |               224 |                 303 |                    10 |                      12 | yes                                   | insurgency                            | none                   | none stay here            | No Reason                | no access to initial place of displacement | None                               | none                 | None                                         | >75%                                | <25%                              | <25%                                          | 25%_50%                         | <25%                      | Blankets/Mats     | on-site (<10 minutes)                | piped water supply           | >15ltr                                      | yes                         | No                                        | not so good (not hygienic)         |                         15 | burning                  | no                                | None                                   | no                           | no                            | yes, onsite      | yes                                   | irregular                        | cultivated                              | no                           | malaria               | yes                          | yes                         | off-site (> 3 km)               | government                           | no                             | none                               | <25%                             | daily_labourer                   |                              10 | yes                                      | yes                 | yes                                        | local leader/community leader | situation in areas of origin              | no                                        |
| 2021-01-28 00:00:00 |          34 | Nigeria   | NG             | NG005         | BAUCHI  | NG005020    | ZAKI       | NG005020011  | TASHENA / GADAI | BA_H408  | GARIN GAMI      |     10.2312 |   12.3169  | Host Communities | Host Communities      | no                       | None       | yes                     | yes            | yes              | yes                   | yes            | yes                  | yes                 | yes                  | Private Building | Host family house             |                     20 |                     101 |           2 |            2 |                8 |                 7 |                19 |                 19 |                18 |                  20 |                     4 |                       2 | no                                    | insurgency                            | flood                  | place of origin           | improved security        | No Reason                                  | None                               | none                 | None                                         | >75%                                | None                              | 51%_75%                                       | 51%_75%                         | 25%_50%                   | mattress          | on-site (<10 minutes)                | hand pumps                   | 10-15ltr                                    | yes                         | No                                        | not so good (not hygienic)         |                         17 | burning                  | no                                | None                                   | yes                          | no                            | yes, onsite      | yes                                   | irregular                        | cash (personal money)                   | no                           | malaria               | no                           | yes                         | on-site (< 3 km)                | local clinic                         | yes                            | on-site                            | 51% - 75%                        | farming                          |                              15 | yes                                      | yes                 | yes                                        | religious leader              | safety and security                       | yes                                       |
| 2021-01-28 00:00:00 |          34 | Nigeria   | NG             | NG008         | BORNO   | NG008023    | MOBBAR     | NG008023004  | DAMASAK         | BO_H355  | KAIRI           |     12.5126 |   13.1047  | Host Communities | Host Communities      | no                       | None       | no                      | yes            | yes              | no                    | yes            | no                   | yes                 | yes                  | Private Building | Host family house             |                    331 |                    1513 |          43 |           52 |              126 |               156 |               217 |                267 |               268 |                 325 |                    26 |                      33 | no                                    | insurgency                            | none                   | place of origin           | improved security        | No Reason                                  | None                               | none                 | <25%                                         | >75%                                | 51%_75%                           | 25%_50%                                       | <25%                            | <25%                      | kitchen sets      | on-site (<10 minutes)                | piped water supply           | 10-15ltr                                    | yes                         | No                                        | not so good (not hygienic)         |                          0 | burning                  | no                                | None                                   | no                           | yes                           | yes, onsite      | yes                                   | once a month                     | cash (personal money)                   | no                           | malaria               | yes                          | yes                         | on-site (< 3 km)                | ngo                                  | yes                            | on-site                            | 25% -50%                         | daily_labourer                   |                             291 | yes                                      | yes                 | no                                         | friends, neighbors and family | safety and security                       | yes                                       |
| 2021-01-28 00:00:00 |          34 | Nigeria   | NG             | NG002         | ADAMAWA | NG002009    | LAMURDE    | NG002009003  | LAFIYA          | AD_H187  | LAFIYA          |     11.8202 |    9.65062 | Host Communities | Host Communities      | no                       | None       | yes                     | no             | no               | no                    | no             | yes                  | no                  | no                   | Private Building | rented house                  |                    420 |                    2520 |          23 |           26 |              137 |               145 |               605 |                617 |               432 |                 435 |                    50 |                      50 | no                                    | communal clashes                      | none                   | place of origin           | rebuild personal shelter | No Reason                                  | None                               | none                 | None                                         | >75%                                | >75%                              | 25%_50%                                       | 25%_50%                         | <25%                      | Blankets/Mats     | on-site (<10 minutes)                | hand pumps                   | 5-10ltr                                     | yes                         | No                                        | not so good (not hygienic)         |                        350 | burning                  | yes                               | None                                   | no                           | no                            | no               | yes                                   | never                            | cultivated                              | no                           | malaria               | no                           | yes                         | on-site (< 3 km)                | government                           | yes                            | on-site                            | 51% - 75%                        | farming                          |                              16 | yes                                      | yes                 | yes                                        | local leader/community leader | situation in areas of origin              | no                                        |
| 2021-01-28 00:00:00 |          34 | Nigeria   | NG             | NG016         | GOMBE   | NG016004    | DUKKU      | NG016004003  | JAMARI          | GM_H052  | KATAPILA        |     10.949  |   11.0196  | Host Communities | Host Communities      | no                       | None       | yes                     | no             | no               | no                    | yes            | yes                  | no                  | yes                  | Private Building | Self-made/makeshift shelter   |                     14 |                      70 |           2 |            3 |                3 |                 4 |                13 |                 17 |                11 |                  14 |                     1 |                       2 | yes                                   | insurgency                            | flood                  | none stay here            | No Reason                | house damaged                              | None                               | none                 | >75%                                         | None                                | None                              | <25%                                          | None                            | <25%                      | Blankets/Mats     | on-site (>10 minutes)                | unprotected well             | 10-15ltr                                    | no                          | yes                                       | not so good (not hygienic)         |                          1 | garbage pit              | yes                               | None                                   | no                           | no                            | yes, onsite      | yes                                   | irregular                        | cultivated                              | no                           | malaria               | yes                          | yes                         | off-site (< 3 km)               | government                           | yes                            | off-site                           | <25%                             | petty_trade                      |                               4 | yes                                      | no                  | no                                         | friends, neighbors and family | access to services                        | no                                        |
| 2021-01-28 00:00:00 |          34 | Nigeria   | NG             | NG036         | YOBE    | NG036006    | GEIDAM     | NG036006001  | ASHEIKRI        | YB_H122  | AJARI           |     11.9302 |   12.8994  | Host Communities | Host Communities      | no                       | None       | yes                     | no             | yes              | no                    | yes            | no                   | no                  | yes                  | Private Building | Host family house             |                     61 |                     397 |          10 |           16 |               14 |                22 |                78 |                116 |                49 |                  75 |                     6 |                      11 | yes                                   | insurgency                            | none                   | place of origin           | rebuild personal shelter | No Reason                                  | None                               | none                 | <25%                                         | >75%                                | <25%                              | <25%                                          | None                            | <25%                      | mosquito nets     | on-site (<10 minutes)                | piped water supply           | 10-15ltr                                    | yes                         | No                                        | not so good (not hygienic)         |                          0 | no waste disposal system | yes                               | None                                   | yes                          | yes                           | yes, onsite      | yes                                   | once a month                     | distribution                            | yes                          | malaria               | no                           | yes                         | on-site (< 3 km)                | government                           | yes                            | off-site                           | <25%                             | farming                          |                             317 | yes                                      | yes                 | yes                                        | traditional leader            | distribution                              | no                                        |
| 2021-01-28 00:00:00 |          34 | Nigeria   | NG             | NG002         | ADAMAWA | NG002020    | YOLA NORTH | NG002020006  | KARENA          | AD_H408  | KAREWA PRY SCH  |     12.4443 |    9.24776 | Host Communities | Host Communities      | no                       | None       | yes                     | yes            | no               | no                    | no             | no                   | no                  | yes                  | Private Building | Host family house             |                    150 |                     502 |           2 |            4 |               63 |                82 |                70 |                 96 |                83 |                  98 |                     3 |                       1 | no                                    | insurgency                            | none                   | place of origin           | improved security        | No Reason                                  | None                               | none                 | None                                         | >75%                                | 25%_50%                           | 25%_50%                                       | None                            | <25%                      | mattress          | on-site (<10 minutes)                | piped water supply           | 10-15ltr                                    | yes                         | No                                        | not so good (not hygienic)         |                        126 | burning                  | no                                | None                                   | no                           | no                            | yes, onsite      | yes                                   | never                            | cash (personal money)                   | no                           | malaria               | no                           | yes                         | off-site (< 3 km)               | government                           | yes                            | off-site                           | 51% - 75%                        | farming                          |                               1 | yes                                      | yes                 | no                                         | friends, neighbors and family | access to services                        | no                                        |
| 2021-01-28 00:00:00 |          34 | Nigeria   | NG             | NG035         | TARABA  | NG035016    | ZING       | NG035016010  | ZING B          | TR_H216  | ANGUWAN MISSION |     11.7437 |    8.99444 | Host Communities | Host Communities      | no                       | None       | no                      | no             | no               | no                    | no             | no                   | no                  | no                   | Private Building | Host family house             |                      7 |                      29 |           1 |            1 |                2 |                 2 |                 5 |                  6 |                 3 |                   7 |                     1 |                       1 | no                                    | insurgency                            | none                   | place of origin           | to join family members   | No Reason                                  | None                               | none                 | None                                         | 25%_50%                             | 25%_50%                           | 25%_50%                                       | >75%                            | >75%                      | Blankets/Mats     | off-site (<10 minutes)               | hand pumps                   | 10-15ltr                                    | yes                         | No                                        | not so good (not hygienic)         |                          5 | burning                  | yes                               | None                                   | no                           | no                            | no               | no                                    | never                            | cultivated                              | no                           | malaria               | yes                          | yes                         | off-site (< 3 km)               | local clinic                         | yes                            | off-site                           | 51% - 75%                        | farming                          |                               4 | yes                                      | yes                 | yes                                        | religious leader              | distribution                              | no                                        |
| 2021-01-28 00:00:00 |          34 | Nigeria   | NG             | NG005         | BAUCHI  | NG005012    | KATAGUM    | NG005012006  | MADANGALA       | BA_H169  | MATSANGO        |     10.1931 |   11.6016  | Host Communities | Host Communities      | no                       | None       | yes                     | yes            | yes              | yes                   | yes            | yes                  | yes                 | yes                  | Private Building | Host family house             |                    162 |                     734 |          20 |           26 |               48 |                26 |               180 |                169 |               122 |                 129 |                     8 |                       6 | no                                    | insurgency                            | none                   | place of origin           | improved security        | No Reason                                  | None                               | none                 | None                                         | >75%                                | 51%_75%                           | 25%_50%                                       | >75%                            | 25%_50%                   | mosquito nets     | on-site (<10 minutes)                | piped water supply           | 10-15ltr                                    | yes                         | No                                        | not so good (not hygienic)         |                        133 | burning                  | no                                | yes                                    | yes                          | no                            | yes, onsite      | yes                                   | everyday                         | cash (personal money)                   | no                           | malaria               | yes                          | yes                         | on-site (< 3 km)                | government                           | yes                            | on-site                            | 51% - 75%                        | farming                          |                              26 | yes                                      | yes                 | yes                                        | friends, neighbors and family | distribution                              | no                                        |
| 2021-01-28 00:00:00 |          34 | Nigeria   | NG             | NG008         | BORNO   | NG008004    | BAYO       | NG008004010  | ZARA            | BO_H460  | BANBARKAR       |     11.8093 |   10.6686  | Host Communities | Host Communities      | no                       | None       | yes                     | no             | yes              | no                    | no             | yes                  | yes                 | no                   | Private Building | rented house                  |                     30 |                     206 |           5 |            6 |               23 |                22 |                39 |                 34 |                33 |                  42 |                     2 |                       0 | no                                    | insurgency                            | none                   | place of origin           | rebuild personal shelter | No Reason                                  | None                               | none                 | None                                         | >75%                                | None                              | 25%_50%                                       | >75%                            | <25%                      | Blankets/Mats     | on-site (<10 minutes)                | protected well               | >15ltr                                      | yes                         | No                                        | not so good (not hygienic)         |                         15 | no waste disposal system | yes                               | None                                   | no                           | no                            | no               | yes                                   | never                            | cultivated                              | no                           | malaria               | yes                          | yes                         | off-site (< 3 km)               | government                           | yes                            | on-site                            | 51% - 75%                        | daily_labourer                   |                              28 | yes                                      | yes                 | no                                         | friends, neighbors and family | access to services                        | no                                        |

TableB:
|   DTM Round | State   | State_Pcode   | LGA             | LGA Pcode   | WARD                | CODs_Ward_Pcode   | SiteID   | Site Name                |   Longitude |   Latitude |   Number of Households |   Number of Individuals |
|------------:|:--------|:--------------|:----------------|:------------|:--------------------|:------------------|:---------|:-------------------------|------------:|-----------:|-----------------------:|------------------------:|
|          29 | BORNO   | NG008         | DIKWA           | NG008008    | DIKWA               | NG008008002       | BO_S142  | AGRIC IDP CAMP           |     13.9029 |   12.0368  |                    968 |                    5443 |
|          29 | ADAMAWA | NG002         | YOLA SOUTH      | NG002021    | NAMTARI             | NG002021008       | AD_S030  | KILBAJE EXTENSION        |     12.3824 |    9.25212 |                     68 |                     492 |
|          29 | TARABA  | NG035         | JALINGO         | NG035007    | KONA                | NG035007004       | TR_S052  | JAURO ISA PRIMARY SCHOOL |     11.3334 |    8.94536 |                    250 |                    1250 |
|          29 | BORNO   | NG008         | MAIDUGURI M. C. | NG008021    | MAISANDARI          | NG008021013       | BO_S116  | AWULAM CAMP              |     13.1342 |   11.7899  |                     47 |                     219 |
|          29 | BORNO   | NG008         | JERE            | NG008013    | DUSUMAN             | NG008013004       | BO_S210  | BAJAURO CAMP             |     13.2392 |   11.8668  |                     59 |                     311 |
|          29 | BORNO   | NG008         | GWOZA           | NG008011    | PULKA/BOKKO         | NG008011013       | BO_S246  | CAMP C (WEGE EXTENSION)  |     13.7741 |   11.2274  |                   2046 |                    9721 |
|          29 | BORNO   | NG008         | DAMBOA          | NG008007    | DAMBOA              | NG008007005       | BO_S218  | MOBILE CLINIC            |     12.7583 |   11.1597  |                     20 |                      84 |
|          29 | BORNO   | NG008         | JERE            | NG008013    | DUSUMAN             | NG008013004       | BO_S195  | MUNA KORI BULA YALAYE    |     13.2411 |   11.8695  |                     36 |                     203 |
|          29 | BORNO   | NG008         | MAIDUGURI M. C. | NG008021    | LAMISULA/JABBA MARI | NG008021010       | BO_S039  | DUJIMA CAMP              |     13.1402 |   11.8494  |                     25 |                     223 |
|          29 | BORNO   | NG008         | JERE            | NG008013    | OLD MAIDUGURI       | NG008013011       | BO_S270  | ANNUR CAMP               |     13.1813 |   11.8718  |                     95 |                     307 |



source_headers: DTM Round
State_Pcode
State
LGA Pcode
LGA
Ward Pcode
Ward
SiteID
Site Name
Longitude
Latitude
Number of Households
Number of Individuals
target_headers: DTM Round
State_Pcode
State
LGA Pcode
LGA
CODs_Ward_Pcode
WARD
SiteID
Site Name
Longitude
Latitude
Number of Households
Number of Individuals
column_mappings: DTM Round
DTM Round
State_Pcode
State_Pcode
State
State
LGA Pcode
LGA Pcode
LGA
LGA
Ward Pcode
CODs_Ward_Pcode
Ward
WARD
SiteID
SiteID
Site Name
Site Name
Longitude
Longitude
Latitude
Latitude
Number of Households
Number of Households
Number of Individuals
Number of Individuals
output: {"column_mappings": [["Snapshot Date", null], ["DTM Round", "DTM Round"], ["Country", null], ["Country Code", null], ["State_Pcode", "State_Pcode"], ["State", "State"], ["LGA Pcode", "LGA Pcode"], ["LGA", "LGA"], ["Ward Pcode", "CODs_Ward_Pcode"], ["Ward", "WARD"], ["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], ["HEALTH Support", null], ["SHELTER-NFI Support", null], ["FOOD Support", null], ["PROTECTION Support", null], ["EDUCATION Support", null], ["LIVELIHOOD Support", 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 (6 - 17 y)", null], ["Girls (6 - 17 y)", 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]]}