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:
| country_name                     | country_code   | reported_date   | admin_1_code   | admin_1_label   | admin_2_code   | admin_2_label   | admin_3_code   | admin_3_label   | Date_enquete        |   hh_PDIs_presents |   ind_PDIs_presents |   hh_RETs_presents |   ind_RETs_presents |
|:---------------------------------|:---------------|:----------------|:---------------|:----------------|:---------------|:----------------|:---------------|:----------------|:--------------------|-------------------:|--------------------:|-------------------:|--------------------:|
| Democratic Republic of the Congo | COD            | Dec-31-20       | COD74          | TANGANYIKA      | COD7409        | KONGOLO         | COD7409ZS01    | KONGOLO         | 2020-12-27 00:00:00 |                  0 |                   0 |                  0 |                   0 |
| Democratic Republic of the Congo | COD            | Dec-31-20       | COD74          | TANGANYIKA      | COD7404        | MOBA            | COD7404ZS02    | MOBA            | 2020-11-09 00:00:00 |                  0 |                   0 |                  0 |                   0 |
| Democratic Republic of the Congo | COD            | Dec-31-20       | COD74          | TANGANYIKA      | COD7410        | NYUNZU          | COD7410ZS01    | NYUNZU          | 2020-11-17 00:00:00 |                  0 |                   0 |                  0 |                   0 |
| Democratic Republic of the Congo | COD            | Dec-31-20       | COD74          | TANGANYIKA      | COD7406        | MANONO          | COD7406ZS02    | KIAMBI          | 2020-12-31 00:00:00 |                  0 |                   0 |                  0 |                   0 |
| Democratic Republic of the Congo | COD            | Dec-31-20       | COD74          | TANGANYIKA      | COD7409        | KONGOLO         | COD7409ZS02    | MBULULA         | 2020-12-29 00:00:00 |                 10 |                  60 |                  0 |                   0 |
| Democratic Republic of the Congo | COD            | Dec-31-20       | COD74          | TANGANYIKA      | COD7404        | MOBA            | COD7404ZS01    | KANSIMBA        | 2020-11-14 00:00:00 |                  0 |                   0 |                  0 |                   0 |
| Democratic Republic of the Congo | COD            | Dec-31-20       | COD74          | TANGANYIKA      | COD7406        | MANONO          | COD7406ZS01    | ANKORO          | 2020-12-23 00:00:00 |                  0 |                   0 |                  0 |                   0 |
| Democratic Republic of the Congo | COD            | Dec-31-20       | COD74          | TANGANYIKA      | COD7410        | NYUNZU          | COD7410ZS01    | NYUNZU          | 2020-11-16 00:00:00 |                  6 |                  35 |                  7 |                  38 |
| Democratic Republic of the Congo | COD            | Dec-31-20       | COD74          | TANGANYIKA      | COD7404        | MOBA            | COD7404ZS01    | KANSIMBA        | 2020-11-12 00:00:00 |                  0 |                   0 |                  0 |                   0 |
| Democratic Republic of the Congo | COD            | Dec-31-20       | COD74          | TANGANYIKA      | COD7409        | KONGOLO         | COD7409ZS01    | KONGOLO         | 2020-12-22 00:00:00 |                  0 |                   0 |                  0 |                   0 |

TableB:
| Snapshot date       | 1#1#c#1 SSID     | 1#1#d#1 _Site Name   | 1#1#a#1 _Site Assessment Date   | 1#4#a#1_Site Open date   | 1#5#e#1 Reason for displacement   | 1#3#b#1 Site Type    |   1#1#f#2_GPS Lat |   1#1#f#1_GPS Long | 1#1#a#3_Admin 0              | Admin 0 Pcode   | 1#1#e#1_Admin 1   | Admin 1 Pcode   | 1#1#e#2_Admin 2   | Admin 2 Pcode   | 1#1#e#3_Admin 3   | Admin 3 Pcode   |   2#1#a#1_No# of Households |   2#1#b#1_No# of Individuals | 2#1#b#2_No# of Male Individuals   | 2#1#b#3_No# of Female Individuals    | 1#5#b#2 Place of Origin of the largest IDP group (Admin 2)   | Place of Origin of the largest IDP group (Admin 2 Pcode)   | 1#5#c#2 Place of Origin of the second largest IDP group (Admin 2   | Place of Origin of the second largest IDP group (Admin 2 Pcode)   |
|:--------------------|:-----------------|:---------------------|:--------------------------------|:-------------------------|:----------------------------------|:---------------------|------------------:|-------------------:|:-----------------------------|:----------------|:------------------|:----------------|:------------------|:----------------|:------------------|:----------------|----------------------------:|-----------------------------:|:----------------------------------|:-------------------------------------|:-------------------------------------------------------------|:-----------------------------------------------------------|:-------------------------------------------------------------------|:------------------------------------------------------------------|
| 2018-04-30 00:00:00 | DRC08004000202SS | KIBABI/POLICE        | 2018-04-25 00:00:00             | 2012-09-01 00:00:00      | Conflict                          | Camp/Site            |          -1.55579 |            28.8301 | Democratic Republic of Congo | COD             | Nord-Kvu          | COD61           | MASISI            | COD6103         | BAHUNDE           | COD610307       |                         334 |                         1380 | 688                               | 692                                  | MASISI                                                       | COD6103                                                    | MASISI                                                             | COD6103                                                           |
| 2018-03-30 00:00:00 | TANG_014         | KALONDA              | 2018-03-20 00:00:00             | 2017-02-22 00:00:00      | Conflict                          | Site                 |          -5.897   |            29.191  | Democratic Republic of Congo | COD             | TANGANYIKA        | COD74           | KALEMIE           | COD74002        | TUMBWE            | COD740204       |                        1565 |                         2154 |                                   |                                      | KALEMIE                                                      | COD7402                                                    |                                                                    |                                                                   |
| 2018-03-30 00:00:00 | TANG_011         | KASEKE               | 2018-03-21 00:00:00             | 2016-09-19 00:00:00      | Conflict                          | Site                 |          -5.92796 |            29.1739 | Democratic Republic of Congo | COD             | TANGANYIKA        | COD74           | KALEMIE           | COD74002        | DU LAC            |                 |                        2999 |                         4885 |                                   |                                      | KALEMIE                                                      | COD7402                                                    |                                                                    |                                                                   |
| 2018-04-30 00:00:00 | DRC08004010104SS | MALEMO               | 2018-04-25 00:00:00             | 2011-03-01 00:00:00      | Conflict                          | Camp/Site            |          -0.99499 |            28.8777 | Democratic Republic of Congo | COD             | Nord-Kvu          | COD61           | MASISI            | COD6103         | BASHALI           | COD610304       |                         469 |                         1572 | 746                               | 826                                  | MASISI                                                       | COD6103                                                    | WALIKALE                                                           | COD6104                                                           |
| 2018-04-30 00:00:00 | DRC08007000108SS | MUHETO               | 2018-04-25 00:00:00             | 2014-01-15 00:00:00      | Conflict                          | Camp/Site            |          -1.336   |            28.95   | Democratic Republic of Congo | COD             | Nord-Kvu          | COD61           | MASISI            | COD6103         | BASHALI           | COD610304       |                         941 |                         2698 | 1115                              | 1583                                 | MASISI                                                       | COD6103                                                    | MASISI                                                             | COD6103                                                           |
| 2018-03-30 00:00:00 | DRC08004000202SS | KIBABI/POLICE        | 2018-03-25 00:00:00             | 2012-09-01 00:00:00      | Conflict                          | Camp/Site            |          -1.55579 |            28.8301 | Democratic Republic of Congo | COD             | Nord-Kvu          | COD61           | MASISI            | COD6103         | BAHUNDE           | COD610307       |                         333 |                         1378 | 687                               | 691                                  | MASISI                                                       | COD6103                                                    | MASISI                                                             | COD6103                                                           |
| 2018-03-30 00:00:00 | TANG_002         | KALUNGA              | 2018-03-21 00:00:00             | 2016-11-19 00:00:00      | Conflict                          | Site                 |          -5.893   |            29.185  | Democratic Republic of Congo | COD             | TANGANYIKA        | COD74           | KALEMIE           | COD74002        | TUMBWE            | COD740204       |                        4278 |                         8451 |                                   |                                      | KALEMIE                                                      | COD7402                                                    |                                                                    |                                                                   |
| 2018-03-30 00:00:00 | DRC08007000700SS | KANABA               | 2018-03-25 00:00:00             | 2015-06-10 00:00:00      | Conflict                          | Camp/Site            |          -1.22834 |            29.2204 | Democratic Republic of Congo | COD             | Nord-Kvu          | COD61           | RUTSHURU          | COD6111         | BWITO             | COD611101       |                        1661 |                         6339 | 2764                              | 3575                                 | RUTSHURU                                                     | COD6111                                                    | RUTSHURU                                                           | COD6111                                                           |
| 2018-03-30 00:00:00 | TANG_001         | MUKUKU/LUKWNGULO     | 2018-03-20 00:00:00             | 2017-08-07 00:00:00      | Conflict                          | Site                 |          -5.88474 |            29.2149 | Democratic Republic of Congo | COD             | TANGANYIKA        | COD74           | KALEMIE           | COD74002        | TUMBWE            | COD740204       |                         607 |                          884 |                                   |                                      | KALEMIE                                                      | COD7402                                                    |                                                                    |                                                                   |
| 2018-03-30 00:00:00 | DRC08007000600SS | RUSHASHI             | 2018-03-25 00:00:00             | 2013-06-10 00:00:00      | Conflict                          | Camp/Site            |          -1.12507 |            29.2016 | Democratic Republic of Congo | COD             | Nord-Kvu          | COD61           | RUTSHURU          | COD6111         | BWITO             | COD611101       |                         862 |                         3494 | 1646                              | 1848                                 | RUTSHURU                                                     | COD6111                                                    | RUTSHURU                                                           | COD6111                                                           |



source_headers: country_name
country_code
reported_date
Date_enquete
admin_1_code
admin_1_label
admin_2_code
admin_2_label
admin_3_code
admin_3_label
target_headers: 1#1#a#3_Admin 0
Admin 0 Pcode
Snapshot date
1#1#a#1 _Site Assessment Date
Admin 1 Pcode
1#1#e#1_Admin 1
Admin 2 Pcode
1#1#e#2_Admin 2
Admin 3 Pcode
1#1#e#3_Admin 3
column_mappings: country_name
1#1#a#3_Admin 0
country_code
Admin 0 Pcode
reported_date
Snapshot date
Date_enquete
1#1#a#1 _Site Assessment Date
admin_1_code
Admin 1 Pcode
admin_1_label
1#1#e#1_Admin 1
admin_2_code
Admin 2 Pcode
admin_2_label
1#1#e#2_Admin 2
admin_3_code
Admin 3 Pcode
admin_3_label
1#1#e#3_Admin 3
output: {"column_mappings": [["country_name", "1#1#a#3_Admin 0"], ["country_code", "Admin 0 Pcode"], ["reported_date", "Snapshot date"], ["admin_1_code", "Admin 1 Pcode"], ["admin_1_label", "1#1#e#1_Admin 1"], ["admin_2_code", "Admin 2 Pcode"], ["admin_2_label", "1#1#e#2_Admin 2"], ["admin_3_code", "Admin 3 Pcode"], ["admin_3_label", "1#1#e#3_Admin 3"], ["Date_enquete", "1#1#a#1 _Site Assessment Date"], ["hh_PDIs_presents", null], ["ind_PDIs_presents", null], ["hh_RETs_presents", null], ["ind_RETs_presents", null]]}