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:
| Reported_Date   | Country   | Country_Code   | Round   | State of Displacement   | State Pcode   | LGA        | LGA Pcode   | Ward              | CODs PCODE   |   Estimated Household Number |   Estimated Number of IDP |   Year | state_orig   | lga_orig   | reason_insurgency_YesNo   | reason_insurg_hh   | reason_insurg_ind   | reason_clash_YesNo   | reason_clash_hh   | reason_clash_ind   | reason_disaster_YesNo   | reason_disaster_hh   | reason_disaster_ind   | reason_others_YesNo   | reason_others_hh   | reason_others_ind   |
|:----------------|:----------|:---------------|:--------|:------------------------|:--------------|:-----------|:------------|:------------------|:-------------|-----------------------------:|--------------------------:|-------:|:-------------|:-----------|:--------------------------|:-------------------|:--------------------|:---------------------|:------------------|:-------------------|:------------------------|:---------------------|:----------------------|:----------------------|:-------------------|:--------------------|
| Oct-31-2021     | Nigeria   | NGA            | R39     | BORNO                   | NG008         | CHIBOK     | NG008006    | CHIBOK GARU       | NG008006001  |                          577 |                      2891 |   2015 | BORNO        | DAMBOA     | Yes                       | 577                | 2891                | No                   |                   |                    | No                      |                      |                       | No                    |                    |                     |
| Oct-31-2021     | Nigeria   | NGA            | R39     | ADAMAWA                 | NG002         | GOMBI      | NG002004    | GOMBI SOUTH       | NG002005007  |                          147 |                       806 |   2016 | BORNO        | GWOZA      | Yes                       | 147                | 806                 | No                   |                   |                    | No                      |                      |                       | No                    |                    |                     |
| Oct-31-2021     | Nigeria   | NGA            | R39     | BAUCHI                  | NG005         | JAMA'ARE   | NG005011    | DOGON JEJI "A"    | NG005011001  |                           18 |                       125 |   2014 | BORNO        | KUKAWA     | Yes                       | 18                 | 125                 | No                   |                   |                    | No                      |                      |                       | No                    |                    |                     |
| Oct-31-2021     | Nigeria   | NGA            | R39     | BORNO                   | NG008         | JERE       | NG008013    | GOMARI            | NG008013005  |                          989 |                      4713 |   2015 | BORNO        | BAMA       | Yes                       | 989                | 4713                | No                   |                   |                    | No                      |                      |                       | No                    |                    |                     |
| Oct-31-2021     | Nigeria   | NGA            | R39     | TARABA                  | NG035         | JALINGO    | NG035007    | TURAKI 'B'        | NG035007010  |                           97 |                       485 |   2014 | TARABA       | JALINGO    | Yes                       | 36                 | 180                 | Yes                  | 61                | 305                | No                      |                      |                       | No                    |                    |                     |
| Oct-31-2021     | Nigeria   | NGA            | R39     | ADAMAWA                 | NG002         | LAMURDE    | NG002009    | RIGANGE           | NG002009008  |                           24 |                       144 |   2017 | ADAMAWA      | NUMAN      | No                        |                    |                     | Yes                  | 24                | 144                | No                      |                      |                       | No                    |                    |                     |
| Oct-31-2021     | Nigeria   | NGA            | R39     | ADAMAWA                 | NG002         | YOLA NORTH | NG002020    | KARENA            | NG002020006  |                          531 |                      1933 |   2014 | BORNO        | GWOZA      | Yes                       | 517                | 1862                | No                   |                   |                    | Yes                     | 14                   | 71                    | No                    |                    |                     |
| Oct-31-2021     | Nigeria   | NGA            | R39     | YOBE                    | NG036         | TARMUWA    | NG036015    | BIRIRI/CHUROKUSKO | NG036015003  |                            7 |                        38 |   2021 | YOBE         | TARMUWA    | Yes                       | 7                  | 38                  | No                   |                   |                    | No                      |                      |                       | No                    |                    |                     |
| Oct-31-2021     | Nigeria   | NGA            | R39     | BAUCHI                  | NG005         | DAMBAM     | NG005004    | GARGAWA           | NG005004003  |                           48 |                       140 |   2014 | YOBE         | GUJBA      | Yes                       | 48                 | 140                 | No                   |                   |                    | No                      |                      |                       | No                    |                    |                     |
| Oct-31-2021     | Nigeria   | NGA            | R39     | BORNO                   | NG008         | BIU        | NG008005    | GARUBULA          | NG008005004  |                           26 |                       216 |   2016 | BORNO        | DAMBOA     | Yes                       | 26                 | 216                 | No                   |                   |                    | No                      |                      |                       | No                    |                    |                     |

TableB:
|   DTM Round | State_Pcode   | State   | LGA_Pcode   | LGA             | Ward_Pcode   | Ward                | SiteID   | Site name             |   Longitude |   Latitude | Site Status   | 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 shelter    |   Number households |   Number 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) |
|------------:|:--------------|:--------|:------------|:----------------|:-------------|:--------------------|:---------|:----------------------|------------:|-----------:|:--------------|:-------------------------|:-----------|:------------------------|:---------------|:-----------------|:----------------------|:---------------|:---------------------|:--------------------|:---------------------|:------------------|:----------------------------|--------------------:|---------------------:|------------:|-------------:|-----------------:|------------------:|------------------:|-------------------:|------------------:|--------------------:|----------------------:|------------------------:|
|          22 | NG008         | BORNO   | NG008013    | JERE            | NG008013005  | GONGULONG           | BO_S234  | GONGULONG CAMP        |     13.1881 |   11.9234  | Informal      | No                       |            | No                      | Yes            | No               | No                    | Yes            | Yes                  | No                  | Yes                  | Ancestral         | Self-made/makeshift shelter |                 163 |                  863 |          20 |           29 |               80 |               121 |               122 |                212 |                90 |                 156 |                    13 |                      20 |
|          22 | NG008         | BORNO   | NG008008    | DIKWA           | NG008008002  | DIKWA               | BO_S138  | SANGAYA               |     13.9166 |   12.0309  | Formal        | Yes                      | INGO       | Yes                     | Yes            | Yes              | Yes                   | Yes            | Yes                  | Yes                 | Yes                  | Public/Government | School                      |                1519 |                 7803 |         153 |          159 |              687 |               718 |              1108 |               1311 |              1510 |                1923 |                   115 |                     119 |
|          22 | NG008         | BORNO   | NG008007    | DAMBOA          | NG008007005  | DAMBOA              | BO_S221  | OLD SECETARIAT CAMP   |     12.7597 |   11.1625  | Informal      | No                       | None       | Yes                     | Yes            | Yes              | Yes                   | Yes            | Yes                  | Yes                 | Yes                  | Public/Government | Government building         |                  48 |                  187 |           4 |            2 |               19 |                20 |                21 |                 32 |                34 |                  49 |                     2 |                       4 |
|          22 | NG008         | BORNO   | NG008013    | JERE            | NG008013004  | DUSUMAN             | BO_S047  | MUNA GARAGE EL BADAWE |     13.2505 |   11.8732  | Formal        | Yes                      | Government | Yes                     | Yes            | Yes              | Yes                   | Yes            | Yes                  | Yes                 | Yes                  | Public/Government | Self-made/makeshift shelter |                6226 |                36688 |         894 |          731 |             4836 |              5911 |              3629 |               4436 |              7011 |                8340 |                   400 |                     500 |
|          22 | NG008         | BORNO   | NG008021    | MAIDUGURI M. C. | NG008021013  | MAISANDARI          | BO_S241  | KORI CAMP             |     13.114  |   11.7998  | Informal      | No                       |            | Yes                     | No             | No               | Yes                   | Yes            | Yes                  | No                  | Yes                  | Private Building  | Emergency shelter           |                 130 |                  360 |          10 |           12 |               19 |                24 |                66 |                 82 |                61 |                  76 |                     4 |                       6 |
|          22 | NG008         | BORNO   | NG008021    | MAIDUGURI M. C. | NG008021013  | MAISANDARI          | BO_S225  | AJIRI II              |     13.1342 |   11.7912  | Informal      | No                       | None       | Yes                     | Yes            | No               | Yes                   | Yes            | Yes                  | Yes                 | Yes                  | Private Building  | Emergency shelter           |                  28 |                  159 |           4 |            6 |               16 |                19 |                32 |                 39 |                18 |                  23 |                     1 |                       1 |
|          22 | NG008         | BORNO   | NG008021    | MAIDUGURI M. C. | NG008021013  | MAISANDARI          | BO_S105  | ALI DAWARI I CAMP     |     13.1328 |   11.7906  | Informal      | No                       | None       | Yes                     | Yes            | Yes              | Yes                   | Yes            | Yes                  | Yes                 | Yes                  | Private Building  | Emergency shelter           |                  24 |                   86 |           2 |            4 |                4 |                 6 |                15 |                 20 |                16 |                  17 |                     1 |                       1 |
|          22 | NG008         | BORNO   | NG008008    | DIKWA           | NG008008002  | DIKWA               | BO_S255  | MASARMARI             |     13.9011 |   12.0428  | Formal        | Yes                      | Government | Yes                     | Yes            | No               | Yes                   | Yes            | Yes                  | No                  | Yes                  | Public/Government | Emergency shelter           |                 381 |                 2124 |          57 |           70 |              172 |               210 |               296 |                362 |               401 |                 491 |                    36 |                      29 |
|          22 | NG008         | BORNO   | NG008021    | MAIDUGURI M. C. | NG008021010  | LAMISULA/JABBA MARI | BO_S039  | DUJIMA CAMP           |     13.1402 |   11.8494  | Informal      | No                       |            | Yes                     | Yes            | Yes              | Yes                   | Yes            | Yes                  | Yes                 | Yes                  | Private Building  | Individual house            |                  22 |                  202 |           4 |            4 |               19 |                23 |                31 |                 37 |                36 |                  44 |                     1 |                       3 |
|          22 | NG035         | TARABA  | NG0350005   | GASSOL          | NG0350005003 | MUTUM BIYU I        | TR_S005  | LG QUARTERS           |     10.7645 |    8.63034 | Informal      | No                       |            | Yes                     | Yes            | Yes              | Yes                   | Yes            | Yes                  | Yes                 | Yes                  | Public/Government | Government building         |                  60 |                  743 |          27 |           31 |               52 |                48 |               128 |                133 |               122 |                 156 |                    21 |                      25 |



source_headers: Round
State of Displacement
State Pcode
LGA
LGA Pcode
Ward
CODs PCODE
Estimated Household Number
Estimated Number of IDP
target_headers: DTM Round
State
State_Pcode
LGA
LGA_Pcode
Ward
Ward_Pcode
Number households
Number individuals
column_mappings: Round
DTM Round
State of Displacement
State
State Pcode
State_Pcode
LGA
LGA
LGA Pcode
LGA_Pcode
Ward
Ward
CODs PCODE
Ward_Pcode
Estimated Household Number
Number households
Estimated Number of IDP
Number individuals
output: {"column_mappings": [["Reported_Date", null], ["Country", null], ["Country_Code", null], ["Round", "DTM Round"], ["State of Displacement", "State"], ["State Pcode", "State_Pcode"], ["LGA", "LGA"], ["LGA Pcode", "LGA_Pcode"], ["Ward", "Ward"], ["CODs PCODE", "Ward_Pcode"], ["Estimated Household Number", "Number households"], ["Estimated Number of IDP", "Number individuals"], ["Year", null], ["state_orig", null], ["lga_orig", null], ["reason_insurgency_YesNo", null], ["reason_insurg_hh", null], ["reason_insurg_ind", null], ["reason_clash_YesNo", null], ["reason_clash_hh", null], ["reason_clash_ind", null], ["reason_disaster_YesNo", null], ["reason_disaster_hh", null], ["reason_disaster_ind", null], ["reason_others_YesNo", null], ["reason_others_hh", null], ["reason_others_ind", null]]}