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       | Date Occurred       | Country   | Country Code   |   Round | State Pcode   | State of Displacement   | LGA Pcode   | LGA      | CODs PCODE   | Ward                |   Estimated Household Number |   Estimated Number of IDP |   Year | idp_category                  | 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   | IDPs_from LGA_displaced_In Ward_YesNo   | IDP HH_from LGA_displaced_In Ward   | IDP IND_from LGA displaced_In Ward   | StateCode_Previous_State of Displacement   | StateName_Previous_State of Displacement   | LGACode_Previous_State of Displacement of largest group 1   | LGAName_Previous_State of Displacement   | Date of arrival largest IDP group 1   | IDP HH of largest Group 1   | IDP IND of largest Group 1   | StateCode_Previous_displacement of Largest Group 2   | StateName_Previous_displacement of Largest Group 2   | LGACode_Previous_displacement of Largest Group 2   | LGAName_Previous_displacement of Largest Group 2   | Date of arrival largest IDP group 2   | IDPHH of largest Group 2   | IDP IND of largest Group 2   | Displaced_FirstTime_Displacement_YesNo   | Displaced_FirstTime_Displacement_Percent   | Displaced_2TIMES_Displacement_YesNo   | Displaced_2TIMES_Displacement_Percent   | Displaced_2TIMES_Displacement_STATECode   | Displaced_2TIMES_Displacement_LGACode   | Displaced_2TIMES_Displacement_Date   | Displaced_3TIMES_Displacement_YesNo   | Displaced_3TIMES_Displacement_Percent   | Displaced_3TIMES_Displacement_STATECode   | Displaced_3TIMES_Displacement_LGACode   | Displaced_3TIMES_Displacement_Date   | Displaced_3TIMES_More_Displacement_YesNo   | Displaced_3TIMES_More_Displacement__Percent   | Displaced_3TIMES_More_Displacement__STATECode   | Displaced_3TIMES_More_Displacement_LGACode   | Displaced_3TIMES_More_Displacement_Date   |
|:--------------------|:--------------------|:----------|:---------------|--------:|:--------------|:------------------------|:------------|:---------|:-------------|:--------------------|-----------------------------:|--------------------------:|-------:|:------------------------------|:-------------|:-----------|:--------------------------|:-------------------|:--------------------|:---------------------|:------------------|:-------------------|:------------------------|:---------------------|:----------------------|:----------------------|:-------------------|:--------------------|:----------------------------------------|:------------------------------------|:-------------------------------------|:-------------------------------------------|:-------------------------------------------|:------------------------------------------------------------|:-----------------------------------------|:--------------------------------------|:----------------------------|:-----------------------------|:-----------------------------------------------------|:-----------------------------------------------------|:---------------------------------------------------|:---------------------------------------------------|:--------------------------------------|:---------------------------|:-----------------------------|:-----------------------------------------|:-------------------------------------------|:--------------------------------------|:----------------------------------------|:------------------------------------------|:----------------------------------------|:-------------------------------------|:--------------------------------------|:----------------------------------------|:------------------------------------------|:----------------------------------------|:-------------------------------------|:-------------------------------------------|:----------------------------------------------|:------------------------------------------------|:---------------------------------------------|:------------------------------------------|
| 2021-06-30 00:00:00 | 2021-09-30 00:00:00 | Nigeria   | NGA            |      37 | NG002         | ADAMAWA                 | NG002016    | NUMAN    | NG002016005  | KODOMTI             |                         1114 |                      7798 |   2017 | Displaced by Communal Clashes | ADAMAWA      | NUMAN      | No                        |                    |                     | Yes                  | 1114              | 7798               | No                      |                      |                       | No                    |                    |                     | Yes                                     | 1114                                | 7798                                 | AD                                         | ADAMAWA                                    | AD16                                                        | NUMAN                                    | 2017-12-01 00:00:00                   | 25                          | 175                          |                                                      |                                                      |                                                    |                                                    |                                       |                            |                              | Yes                                      | 100                                        |                                       |                                         |                                           |                                         |                                      |                                       |                                         |                                           |                                         |                                      |                                            |                                               |                                                 |                                              |                                           |
| 2021-06-30 00:00:00 | 2021-09-30 00:00:00 | Nigeria   | NGA            |      37 | NG036         | YOBE                    | NG036010    | KARASAWA | NG036010001  | BUKARTI             |                           39 |                       232 |   2014 | Displaced by Insurgency       | BORNO        | KUKAWA     | Yes                       | 39                 | 232                 | No                   |                   |                    | No                      |                      |                       | No                    |                    |                     | No                                      |                                     |                                      |                                            |                                            |                                                             |                                          |                                       |                             |                              |                                                      |                                                      |                                                    |                                                    |                                       |                            |                              | Yes                                      | 100                                        |                                       |                                         |                                           |                                         |                                      |                                       |                                         |                                           |                                         |                                      |                                            |                                               |                                                 |                                              |                                           |
| 2021-06-30 00:00:00 | 2021-09-30 00:00:00 | Nigeria   | NGA            |      37 | NG002         | ADAMAWA                 | NG002013    | MICHIKA  | NG002013012  | SUKUMU / TILLIJO    |                          380 |                      1900 |   2015 | Displaced by Insurgency       | ADAMAWA      | MADAGALI   | Yes                       | 380                | 1900                | No                   |                   |                    | No                      |                      |                       | No                    |                    |                     | No                                      |                                     |                                      |                                            |                                            |                                                             |                                          |                                       |                             |                              |                                                      |                                                      |                                                    |                                                    |                                       |                            |                              | Yes                                      | 100                                        |                                       |                                         |                                           |                                         |                                      |                                       |                                         |                                           |                                         |                                      |                                            |                                               |                                                 |                                              |                                           |
| 2021-06-30 00:00:00 | 2021-09-30 00:00:00 | Nigeria   | NGA            |      37 | NG035         | TARABA                  | NG035015    | YORRO    | NG035015009  | PUPULE III          |                           30 |                       151 |   2018 | Displaced by Communal Clashes | TARABA       | LAU        | No                        |                    |                     | Yes                  | 30                | 151                | No                      |                      |                       | No                    |                    |                     | No                                      |                                     |                                      |                                            |                                            |                                                             |                                          |                                       |                             |                              |                                                      |                                                      |                                                    |                                                    |                                       |                            |                              | Yes                                      | 10                                         | Yes                                   | 85                                      | TR                                        | TR10                                    | 5)2018                               | Yes                                   | 5                                       | AD                                        | AD10                                    | 1)Before 2015                        | No                                         |                                               |                                                 |                                              |                                           |
| 2021-06-30 00:00:00 | 2021-09-30 00:00:00 | Nigeria   | NGA            |      37 | NG008         | BORNO                   | NG008012    | HAWUL    | NG008012006  | KWAJAFFA/HANG       |                          869 |                      5462 |   2014 | Displaced by Insurgency       | BORNO        | HAWUL      | Yes                       | 869                | 5462                | No                   |                   |                    | No                      |                      |                       | No                    |                    |                     | Yes                                     | 869                                 | 5462                                 | BO                                         | BORNO                                      | BO12                                                        | HAWUL                                    |                                       |                             |                              |                                                      |                                                      |                                                    |                                                    |                                       |                            |                              | Yes                                      | 100                                        |                                       |                                         |                                           |                                         |                                      |                                       |                                         |                                           |                                         |                                      |                                            |                                               |                                                 |                                              |                                           |
| 2021-06-30 00:00:00 | 2021-09-30 00:00:00 | Nigeria   | NGA            |      37 | NG036         | YOBE                    | NG036005    | FUNE     | NG036005009  | GUDUGURKA/MARMAR  I |                            5 |                        27 |   2014 | Displaced by Insurgency       | YOBE         | BURSARI    | Yes                       | 5                  | 27                  | No                   |                   |                    | No                      |                      |                       | No                    |                    |                     | No                                      |                                     |                                      |                                            |                                            |                                                             |                                          |                                       |                             |                              |                                                      |                                                      |                                                    |                                                    |                                       |                            |                              | Yes                                      | 100                                        |                                       |                                         |                                           |                                         |                                      |                                       |                                         |                                           |                                         |                                      |                                            |                                               |                                                 |                                              |                                           |
| 2021-06-30 00:00:00 | 2021-09-30 00:00:00 | Nigeria   | NGA            |      37 | NG002         | ADAMAWA                 | NG002001    | DEMSA    | NG002001008  | KPASHAM             |                          295 |                      1770 |   2015 | Displaced by Communal Clashes | ADAMAWA      | DEMSA      | Yes                       | 15                 | 90                  | Yes                  | 280               | 1680               | No                      |                      |                       | No                    |                    |                     | Yes                                     | 295                                 | 1770                                 | AD                                         | ADAMAWA                                    | AD01                                                        | DEMSA                                    | 2018-02-01 00:00:00                   |                             |                              |                                                      |                                                      |                                                    |                                                    |                                       |                            |                              | Yes                                      | 100                                        |                                       |                                         |                                           |                                         |                                      |                                       |                                         |                                           |                                         |                                      |                                            |                                               |                                                 |                                              |                                           |
| 2021-06-30 00:00:00 | 2021-09-30 00:00:00 | Nigeria   | NGA            |      37 | NG008         | BORNO                   | NG008005    | BIU      | NG008005001  | BURATAI             |                          513 |                      3862 |   2015 | Displaced by Insurgency       | BORNO        | DAMBOA     | Yes                       | 513                | 3862                | No                   |                   |                    | No                      |                      |                       | No                    |                    |                     | No                                      |                                     |                                      |                                            |                                            |                                                             |                                          |                                       |                             |                              |                                                      |                                                      |                                                    |                                                    |                                       |                            |                              | Yes                                      | 100                                        |                                       |                                         |                                           |                                         |                                      |                                       |                                         |                                           |                                         |                                      |                                            |                                               |                                                 |                                              |                                           |
| 2021-06-30 00:00:00 | 2021-09-30 00:00:00 | Nigeria   | NGA            |      37 | NG036         | YOBE                    | NG036002    | BURSARI  | NG036002001  | BAYAMARI            |                          178 |                       895 |   2014 | Displaced by Insurgency       | BORNO        | KUKAWA     | Yes                       | 146                | 745                 | No                   |                   |                    | Yes                     | 32                   | 150                   | No                    |                    |                     | No                                      |                                     |                                      |                                            |                                            |                                                             |                                          |                                       |                             |                              |                                                      |                                                      |                                                    |                                                    |                                       |                            |                              | Yes                                      | 89                                         | Yes                                   | 11                                      | YB                                        | YB01                                    | 6)2019                               | No                                    |                                         |                                           |                                         |                                      | No                                         |                                               |                                                 |                                              |                                           |
| 2021-06-30 00:00:00 | 2021-09-30 00:00:00 | Nigeria   | NGA            |      37 | NG036         | YOBE                    | NG036007    | GUJBA    | NG036007008  | MUTAI               |                          293 |                      2051 |   2016 | Displaced by Insurgency       | YOBE         | GUJBA      | Yes                       | 293                | 2051                | No                   |                   |                    | No                      |                      |                       | No                    |                    |                     | No                                      |                                     |                                      |                                            |                                            |                                                             |                                          |                                       |                             |                              |                                                      |                                                      |                                                    |                                                    |                                       |                            |                              | No                                       |                                            | Yes                                   | 100                                     |                                           |                                         |                                      | No                                    |                                         |                                           |                                         |                                      | No                                         |                                               |                                                 |                                              |                                           |

TableB:
| State_Pcode   | State   | LGA Pcode   | LGA             | CODs_Ward_Pcode   | WARD            | SiteID   | Site Name      |   Longitude |   Latitude |   Number of Households |   Number of Individuals |
|:--------------|:--------|:------------|:----------------|:------------------|:----------------|:---------|:---------------|------------:|-----------:|-----------------------:|------------------------:|
| NG002         | ADAMAWA | NG002021    | YOLA SOUTH      | NG002021003       | BOLE YOLDE PATE | AD_H495  | JACCINGO       |     12.3473 |    9.12249 |                    122 |                     780 |
| NG016         | GOMBE   | NG016004    | DUKKU           | NG016004011       | ZAUNE           | GM_H064  | ANGUWAR FADA   |     10.8435 |   11.0512  |                     10 |                      40 |
| NG008         | BORNO   | NG008021    | MAIDUGURI M. C. | NG008021008       | GWANGE  III     | BO_H305  | BANA BOHMA     |     13.1755 |   11.8227  |                    243 |                    1414 |
| NG002         | ADAMAWA | NG002007    | HONG            | NG002007009       | MAYO LOPE       | AD_H156  | GWAMA          |     13.1679 |   10.2725  |                      1 |                       4 |
| NG002         | ADAMAWA | NG002004    | GIREI           | NG002004001       | DAKRI           | AD_H062  | DARKI          |     12.4721 |    9.33412 |                     34 |                     124 |
| NG016         | GOMBE   | NG016005    | FUNAKAYE        | NG016005002       | BAGE            | GM_H183  | JUGOL BORKONO  |     11.3036 |   10.5603  |                     26 |                     212 |
| NG036         | YOBE    | NG036014    | POTISKUM        | NG036014006       | DOGO NINI       | YB_H322  | DADIN KOWA     |     11.091  |   11.7237  |                     40 |                     258 |
| NG002         | ADAMAWA | NG002001    | DEMSA           | NG002001010       | NASSARAWO DEMSA | AD_H024  | NASARAWO DEMSA |     12.0479 |    9.44773 |                     34 |                     204 |
| NG002         | ADAMAWA | NG002015    | MUBI SOUTH      | NG002015004       | GUDE            | AD_H333  | GIDAN MADARA   |     13.2972 |   10.2559  |                     17 |                     114 |
| NG035         | TARABA  | NG035005    | GASSOL          | NG035005005       | NAM NAI         | TR_H068  | ANG. BUBA      |     10.9509 |    8.76694 |                     16 |                      82 |



source_headers: State Pcode
State of Displacement
LGA Pcode
LGA
CODs PCODE
Ward
Estimated Household Number
Estimated Number of IDP
target_headers: State_Pcode
State
LGA Pcode
LGA
CODs_Ward_Pcode
WARD
Number of Households
Number of Individuals
column_mappings: State Pcode
State_Pcode
State of Displacement
State
LGA Pcode
LGA Pcode
LGA
LGA
CODs PCODE
CODs_Ward_Pcode
Ward
WARD
Estimated Household Number
Number of Households
Estimated Number of IDP
Number of Individuals
output: {"column_mappings": [["Snapshot date", null], ["Date Occurred", null], ["Country", null], ["Country Code", null], ["Round", null], ["State Pcode", "State_Pcode"], ["State of Displacement", "State"], ["LGA Pcode", "LGA Pcode"], ["LGA", "LGA"], ["CODs PCODE", "CODs_Ward_Pcode"], ["Ward", "WARD"], ["Estimated Household Number", "Number of Households"], ["Estimated Number of IDP", "Number of Individuals"], ["Year", null], ["idp_category", 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], ["IDPs_from LGA_displaced_In Ward_YesNo", null], ["IDP HH_from LGA_displaced_In Ward", null], ["IDP IND_from LGA displaced_In Ward", null], ["StateCode_Previous_State of Displacement", null], ["StateName_Previous_State of Displacement", null], ["LGACode_Previous_State of Displacement of largest group 1", null], ["LGAName_Previous_State of Displacement", null], ["Date of arrival largest IDP group 1", null], ["IDP HH of largest Group 1", null], ["IDP IND of largest Group 1", null], ["StateCode_Previous_displacement of Largest Group 2", null], ["StateName_Previous_displacement of Largest Group 2", null], ["LGACode_Previous_displacement of Largest Group 2", null], ["LGAName_Previous_displacement of Largest Group 2", null], ["Date of arrival largest IDP group 2", null], ["IDPHH of largest Group 2", null], ["IDP IND of largest Group 2", null], ["Displaced_FirstTime_Displacement_YesNo", null], ["Displaced_FirstTime_Displacement_Percent", null], ["Displaced_2TIMES_Displacement_YesNo", null], ["Displaced_2TIMES_Displacement_Percent", null], ["Displaced_2TIMES_Displacement_STATECode", null], ["Displaced_2TIMES_Displacement_LGACode", null], ["Displaced_2TIMES_Displacement_Date", null], ["Displaced_3TIMES_Displacement_YesNo", null], ["Displaced_3TIMES_Displacement_Percent", null], ["Displaced_3TIMES_Displacement_STATECode", null], ["Displaced_3TIMES_Displacement_LGACode", null], ["Displaced_3TIMES_Displacement_Date", null], ["Displaced_3TIMES_More_Displacement_YesNo", null], ["Displaced_3TIMES_More_Displacement__Percent", null], ["Displaced_3TIMES_More_Displacement__STATECode", null], ["Displaced_3TIMES_More_Displacement_LGACode", null], ["Displaced_3TIMES_More_Displacement_Date", null]]}