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:
|   SHCC Event Code | Incident date   | Country     | Perpetrator    | Weapons use      | Total health worker killed   | Total health worker kidnapped   | Total health worker arrested    | Total health worker threatened/intimidated    | Total health worker injured   | Total health worker assaulted   | Total health worker sexual violence   | Total number of attacks on facilities which reported destruction   | Total number of attacks on facilities which reported damage   | Health transportation destroyed   | Health transportation damaged   | Health transportation stolen/highjacked   |
|------------------:|:----------------|:------------|:---------------|:-----------------|:-----------------------------|:--------------------------------|:--------------------------------|:----------------------------------------------|:------------------------------|:--------------------------------|:--------------------------------------|:-------------------------------------------------------------------|:--------------------------------------------------------------|:----------------------------------|:--------------------------------|:------------------------------------------|
|               308 | 2020-04         | Libya       | Multiple       | NoInformation    |                              |                                 |                                 |                                               |                               |                                 |                                       |                                                                    |                                                               |                                   |                                 | 3                                         |
|               539 | 2020-05         | Libya       | Multiple       | Firearm          |                              |                                 |                                 |                                               | 1                             | 1                               |                                       |                                                                    |                                                               |                                   | 2                               | 1                                         |
|              1179 | 2020-11         | Afghanistan | NoInformation  |                  |                              |                                 |                                 |                                               |                               |                                 |                                       |                                                                    |                                                               |                                   |                                 |                                           |
|                68 | 2020-01         | Syria       | StateForces    | ExplosiveWeapons |                              |                                 |                                 |                                               | 1                             |                                 |                                       |                                                                    |                                                               |                                   |                                 |                                           |
|               600 | 2020-06         | Mozambique  | NoInformation  |                  |                              |                                 |                                 |                                               |                               |                                 |                                       | 1                                                                  |                                                               |                                   |                                 |                                           |
|              1347 | 2020-12         | Syria       | NonStateActor  |                  |                              |                                 |                                 |                                               |                               | 1                               |                                       |                                                                    |                                                               |                                   |                                 |                                           |
|              1261 | 2020-12         | Libya       | NoInformation  |                  |                              |                                 |                                 |                                               |                               |                                 |                                       |                                                                    |                                                               |                                   |                                 |                                           |
|               417 | 2020-04         | Libya       | NoInformation  | ExplosiveWeapons |                              |                                 |                                 |                                               |                               |                                 |                                       | 1                                                                  |                                                               |                                   |                                 |                                           |
|               911 | 2020-10         | Afghanistan | NoInformation  |                  |                              |                                 |                                 |                                               |                               |                                 |                                       |                                                                    |                                                               |                                   |                                 |                                           |
|              1226 | 2020-05         | Nigeria     | NoInformation  | Other            |                              |                                 |                                 |                                               |                               |                                 |                                       |                                                                    | 1                                                             |                                   |                                 |                                           |

TableB:
| SHCC Event Code   | Incident date       | ISO3 codes   | Perpetrator      | Weapons use                           | Total health worker killed   | Total health worker kidnapped   | Total health worker injured   | Total health worker assaulted   | Total number of attacks on facilities which reported destruction   | Total number of attacks on facilities which reported damage   | Conflict Event   | politicalRelatedViolence   | ebolaRelatedViolence   | vaccinationRelatedViolence   | COVID 19 Event   |
|:------------------|:--------------------|:-------------|:-----------------|:--------------------------------------|:-----------------------------|:--------------------------------|:------------------------------|:--------------------------------|:-------------------------------------------------------------------|:--------------------------------------------------------------|:-----------------|:---------------------------|:-----------------------|:-----------------------------|:-----------------|
| 2019SHCC1190      | 2019-01-24 00:00:00 | SYR          | State military   | Aerial bombing, missiles and shelling |                              |                                 |                               |                                 | 1                                                                  |                                                               | ConflictEvent    | NotApplicable              | NotApplicable          | NotApplicable                | NotApplicable    |
| 32353             | 2022-05-09 00:00:00 | UKR          | State military   |                                       |                              |                                 |                               |                                 | 1                                                                  | 0                                                             | ConflictEvent    | NotApplicable              | NotApplicable          | NotApplicable                | NotApplicable    |
| 2018SHCC500       | 2018-01-09 00:00:00 | PSE          | State military   | Firearms                              |                              |                                 | 1                             |                                 |                                                                    |                                                               | ConflictEvent    | Politically-related        | NotApplicable          | NotApplicable                | NotApplicable    |
| 31992             | 2022-04-01 00:00:00 | HTI          | Criminal         | Firearms                              |                              |                                 |                               |                                 |                                                                    |                                                               | ConflictEvent    | NotApplicable              | NotApplicable          | NotApplicable                | NotApplicable    |
| 21994             | 2016-01-11 00:00:00 | AFG          | State military   | Firearms                              |                              |                                 |                               |                                 | 0                                                                  | 0                                                             | NotApplicable    | NotApplicable              | NotApplicable          | NotApplicable                | NotApplicable    |
| 355               | 2009-06-29 00:00:00 | SDN          | Opposition group | Firearms                              |                              |                                 |                               |                                 |                                                                    |                                                               | NotApplicable    | NotApplicable              | NotApplicable          | NotApplicable                | NotApplicable    |
| 2017SHCC40        | 2017-02-18 00:00:00 | CAF          |                  |                                       |                              |                                 |                               |                                 |                                                                    |                                                               | ConflictEvent    | NotApplicable              | NotApplicable          | NotApplicable                | NotApplicable    |
| 2018SHCC903       | 2018-09-14 00:00:00 | SYR          | State military   |                                       |                              |                                 |                               |                                 |                                                                    |                                                               | ConflictEvent    | NotApplicable              | NotApplicable          | NotApplicable                | NotApplicable    |
| 2019SHCC446       | 2019-04-08 00:00:00 | SOM          |                  |                                       |                              |                                 |                               |                                 |                                                                    |                                                               | ConflictEvent    | NotApplicable              | NotApplicable          | NotApplicable                | NotApplicable    |
| 2017SHCC633       | 2017-04-26 00:00:00 | SYR          | State military   | Aerial bombing, missiles and shelling |                              |                                 |                               |                                 | 1                                                                  |                                                               | ConflictEvent    | NotApplicable              | NotApplicable          | NotApplicable                | NotApplicable    |



source_headers: SHCC Event Code
Incident date
Perpetrator 
Weapons use
Total health worker killed
Total health worker kidnapped
Total health worker injured
Total health worker assaulted
Total number of attacks on facilities which reported destruction
Total number of attacks on facilities which reported damage
target_headers: SHCC Event Code
Incident date
Perpetrator 
Weapons use
Total health worker killed
Total health worker kidnapped
Total health worker injured
Total health worker assaulted
Total number of attacks on facilities which reported destruction
Total number of attacks on facilities which reported damage
column_mappings: SHCC Event Code
SHCC Event Code
Incident date
Incident date
Perpetrator 
Perpetrator 
Weapons use
Weapons use
Total health worker killed
Total health worker killed
Total health worker kidnapped
Total health worker kidnapped
Total health worker injured
Total health worker injured
Total health worker assaulted
Total health worker assaulted
Total number of attacks on facilities which reported destruction
Total number of attacks on facilities which reported destruction
Total number of attacks on facilities which reported damage
Total number of attacks on facilities which reported damage
output: {"column_mappings": [["SHCC Event Code", "SHCC Event Code"], ["Incident date", "Incident date"], ["Country", null], ["Perpetrator ", "Perpetrator "], ["Weapons use", "Weapons use"], ["Total health worker killed", "Total health worker killed"], ["Total health worker kidnapped", "Total health worker kidnapped"], ["Total health worker arrested ", null], ["Total health worker threatened/intimidated ", null], ["Total health worker injured", "Total health worker injured"], ["Total health worker assaulted", "Total health worker assaulted"], ["Total health worker sexual violence", null], ["Total number of attacks on facilities which reported destruction", "Total number of attacks on facilities which reported destruction"], ["Total number of attacks on facilities which reported damage", "Total number of attacks on facilities which reported damage"], ["Health transportation destroyed", null], ["Health transportation damaged", null], ["Health transportation stolen/highjacked", null]]}