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:
| REGION        | PROVINCE   | PROV_CODE   | DISTRICT        | DIST_CODE   | ORG_ACRONYM   | ORG_NAME                                                       | ORG_TYPE          | CLUSTER_SECTOR_CODE   | CLUSTER_SECTOR_NAME                                      |
|:--------------|:-----------|:------------|:----------------|:------------|:--------------|:---------------------------------------------------------------|:------------------|:----------------------|:---------------------------------------------------------|
| South Eastern | Ghazni     | AF11        | Malistan        | AF1116      | DRC           | Danish Refugee Council                                         | International NGO | ESNFI_OC              | Operational Capacity: Emergency Shelter & Non-Food Items |
| Capital       | Kabul      | AF01        | Shakar Dara     | AF0106      | UNICEF        | United Nations Children's Fund                                 | United Nations    | ESNFI_OC              | Operational Capacity: Emergency Shelter & Non-Food Items |
| Capital       | Kabul      | AF01        | Chahar Asyab    | AF0103      | MOVE          | MOVE Welfare Organization                                      | International NGO | HEALTH_OC             | Opeartional Capacity: Health                             |
| Northern      | Balkh      | AF21        | Keshendeh       | AF2114      | CARE          | Care International in Afghanistan                              | International NGO | ESNFI_OC              | Operational Capacity: Emergency Shelter & Non-Food Items |
| Southern      | Hilmand    | AF30        | Deh-e-Shu       | AF3013      | BRAC          | Bangladesh Rural Advancement Committee Afghanistan             | International NGO | NUTRITION_OC          | Operational Capacity: Nutrition                          |
| Eastern       | Nangarhar  | AF06        | Kot             | AF0613      | DACAAR        | Danish Committee for Aid to Afghan Refugees                    | International NGO | WASH_OC               | Operational Capacity: Water, Sanitation & Hygiene        |
| South Eastern | Khost      | AF14        | Mandozayi       | AF1402      | OHD           | Organization for Humanitarian and Development                  | National NGO      | FSAC_OC               | Operational Capacity: Food Security & Agriculture        |
| Northern      | Jawzjan    | AF28        | Khanaqa         | AF2803      | CARE          | Care International in Afghanistan                              | International NGO | ESNFI_OC              | Operational Capacity: Emergency Shelter & Non-Food Items |
| Western       | Hirat      | AF32        | Injil           | AF3202      | CRDSA         | Coordination Of Rehabilitation Services For Afghanistan        | National NGO      | WASH_OC               | Operational Capacity: Water, Sanitation & Hygiene        |
| Western       | Hirat      | AF32        | Pashtun Zarghun | AF3206      | AHDAA         | Agency for Humanitarian Development Assistance for Afghanistan | National NGO      | WASH_OC               | Operational Capacity: Water, Sanitation & Hygiene        |

TableB:
| REGION        | PROVINCE   | PROV_CODE   | DISTRICT      | DIST_CODE   | ORG_ACRONYM   | ORG_NAME                                                | ORG_TYPE          | CLUSTER_SECTOR_CODE   | CLUSTER_SECTOR_NAME                                      |
|:--------------|:-----------|:------------|:--------------|:------------|:--------------|:--------------------------------------------------------|:------------------|:----------------------|:---------------------------------------------------------|
| Western       | Hirat      | AF32        | Injil         | AF3202      | ARAA          | Ansari Rehabilitation Association for Afghanistan       | National NGO      | FSAC_OP               | Operational Presence: Food Security & Agriculture        |
| Eastern       | Nuristan   | AF16        | Mandol        | AF1607      | AHEAD         | Assitant for Health Education and Development           | National NGO      | NUTRITION_OP          | Operational Presence: Nutrition                          |
| Southern      | Kandahar   | AF27        | Kandahar      | AF2701      | UNICEF        | United Nations Children's Fund                          | United Nations    | WASH_OP               | Operatioanl Presence: Water, Sanitation & Hygiene        |
| Southern      | Nimroz     | AF34        | Khashrod      | AF3405      | RI            | Relief International                                    | International NGO | WASH_OP               | Operatioanl Presence: Water, Sanitation & Hygiene        |
| North Eastern | Kunduz     | AF19        | Dasht-e-Archi | AF1906      | ADA           | Afghan Development Association                          | National NGO      | WASH_OP               | Operatioanl Presence: Water, Sanitation & Hygiene        |
| North Eastern | Takhar     | AF18        | Eshkmesh      | AF1811      | DACAAR        | Danish Committee for Aid to Afghan Refugees             | International NGO | WASH_OP               | Operatioanl Presence: Water, Sanitation & Hygiene        |
| Southern      | Kandahar   | AF27        | Zheray        | AF2705      | HAPA          | Humanitarian Action for People of Afghanistan           | National NGO      | FSAC_OP               | Operational Presence: Food Security & Agriculture        |
| Western       | Hirat      | AF32        | Guzara        | AF3203      | CRDSA         | Coordination Of Rehabilitation Services For Afghanistan | National NGO      | ESNFI_OP              | Operational Presence: Emergency Shelter & Non-Food Items |
| Southern      | Kandahar   | AF27        | Panjwayi      | AF2704      | HRDA          | Human Resource Development Agency                       | National NGO      | ESNFI_OP              | Operational Presence: Emergency Shelter & Non-Food Items |
| North Eastern | Takhar     | AF18        | Kalafgan      | AF1807      | AKF           | Aga Khan Foundation                                     | International NGO | FSAC_OP               | Operational Presence: Food Security & Agriculture        |



source_headers: REGION
PROVINCE
PROV_CODE
DISTRICT
DIST_CODE
ORG_ACRONYM
ORG_NAME
ORG_TYPE
CLUSTER_SECTOR_CODE
CLUSTER_SECTOR_NAME
target_headers: REGION
PROVINCE
PROV_CODE
DISTRICT
DIST_CODE
ORG_ACRONYM
ORG_NAME
ORG_TYPE
CLUSTER_SECTOR_CODE
CLUSTER_SECTOR_NAME
column_mappings: REGION
REGION
PROVINCE
PROVINCE
PROV_CODE
PROV_CODE
DISTRICT
DISTRICT
DIST_CODE
DIST_CODE
ORG_ACRONYM
ORG_ACRONYM
ORG_NAME
ORG_NAME
ORG_TYPE
ORG_TYPE
CLUSTER_SECTOR_CODE
CLUSTER_SECTOR_CODE
CLUSTER_SECTOR_NAME
CLUSTER_SECTOR_NAME
output: {"column_mappings": [["REGION", "REGION"], ["PROVINCE", "PROVINCE"], ["PROV_CODE", "PROV_CODE"], ["DISTRICT", "DISTRICT"], ["DIST_CODE", "DIST_CODE"], ["ORG_ACRONYM", "ORG_ACRONYM"], ["ORG_NAME", "ORG_NAME"], ["ORG_TYPE", "ORG_TYPE"], ["CLUSTER_SECTOR_CODE", "CLUSTER_SECTOR_CODE"], ["CLUSTER_SECTOR_NAME", "CLUSTER_SECTOR_NAME"]]}