Task: Schema-Matching (source dataset: assays)

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:
|   assay_id |   src_id | assay_type   | bao_format   | assay_tax_id   |   doc_id | description                                                                                                 | assay_test_type   | assay_category   | assay_organism   | assay_strain   | assay_tissue   | assay_cell_type   | assay_subcellular_fraction   |
|-----------:|---------:|:-------------|:-------------|:---------------|---------:|:------------------------------------------------------------------------------------------------------------|:------------------|:-----------------|:-----------------|:---------------|:---------------|:------------------|:-----------------------------|
|          1 |        1 | B            | BAO_0000019  |                |    11087 | The compound was tested for the in vitro inhibition of platelet 12-lipoxygenase at a concentration of 30 uM |                   |                  |                  |                |                |                   |                              |
|          2 |        1 | F            | BAO_0000219  |                |      684 | Compound was evaluated for its ability to mobilize calcium in 1321NI cells                                  |                   |                  |                  |                |                |                   |                              |
|          3 |        1 | B            | BAO_0000019  |                |    15453 |                                                                                                             |                   |                  |                  |                |                |                   |                              |
|          4 |        1 | B            | BAO_0000249  | 9913.0         |    17841 | Binding affinity against A2 adenosine receptor in bovine striatal membranes using [3H]CGS-21680             |                   |                  | Bos taurus       |                |                |                   |                              |
|          5 |        1 | F            | BAO_0000219  | 9606.0         |    17430 | In vitro cell cytotoxicity against 143-B cell lines (Human osteosarcoma cell line)                          |                   |                  | Homo sapiens     |                |                | 143B              |                              |
|          6 |        1 | F            | BAO_0000219  | 9606.0         |    17430 | In vitro cell cytotoxicity against 143-B cell lines (Human osteosarcoma cell line)                          |                   |                  | Homo sapiens     |                |                | 143B              |                              |
|          7 |        1 | F            | BAO_0000219  | 10090.0        |    13799 | Cytotoxic Activity was evaluated against 143B (TK-) tumor cells                                             |                   |                  | Mus musculus     |                |                | 143B              |                              |
|          8 |        1 | F            | BAO_0000219  | 9606.0         |    17774 | In vitro cell cytotoxicity was determined against 143B cell line                                            |                   |                  | Homo sapiens     |                |                | 143B              |                              |
|          9 |        1 | F            | BAO_0000219  | 9606.0         |     3801 | Inhibitory activity against tumor osteosarcoma cell line 143B after 72 hr continuous exposure to compound   |                   |                  | Homo sapiens     |                |                | 143B              |                              |
|         10 |        1 | F            | BAO_0000219  | 9606.0         |    17430 | In vitro cell cytotoxicity against 143B-LTK cell lines expressed in HSV-1 TK                                |                   |                  | Homo sapiens     |                |                | 143B              |                              |

TableB:
|   assay_id |   src_id | assay_type   | bao_format   |   assay_tax_id |   doc_id |   tid | relationship_type   |   confidence_score | curated_by   | src_assay_id   | chembl_id    | cell_id   | tissue_id   | variant_id   |
|-----------:|---------:|:-------------|:-------------|---------------:|---------:|------:|:--------------------|-------------------:|:-------------|:---------------|:-------------|:----------|:------------|:-------------|
|       7524 |        1 | A            | BAO_0000218  |          10116 |     9866 | 50597 | N                   |                  1 | Intermediate |                | CHEMBL618647 |           | 2113.0      |              |
|       7525 |        1 | A            | BAO_0000218  |          10116 |     9866 | 50597 | N                   |                  1 | Intermediate |                | CHEMBL618648 |           | 2113.0      |              |
|       7526 |        1 | A            | BAO_0000218  |          10116 |     9866 | 50597 | N                   |                  1 | Intermediate |                | CHEMBL618649 |           | 2113.0      |              |
|       7527 |        1 | A            | BAO_0000218  |          10116 |     9866 | 50597 | N                   |                  1 | Intermediate |                | CHEMBL618650 |           | 2107.0      |              |
|       7528 |        1 | A            | BAO_0000218  |          10116 |     9866 | 50597 | N                   |                  1 | Intermediate |                | CHEMBL618651 |           | 2107.0      |              |
|       7529 |        1 | A            | BAO_0000218  |          10116 |     9866 | 50597 | N                   |                  1 | Intermediate |                | CHEMBL876497 |           | 2107.0      |              |
|       7530 |        1 | A            | BAO_0000218  |          10116 |     9866 | 50597 | N                   |                  1 | Intermediate |                | CHEMBL618652 |           | 2048.0      |              |
|       7531 |        1 | A            | BAO_0000218  |          10116 |     9866 | 50597 | N                   |                  1 | Intermediate |                | CHEMBL618653 |           | 2048.0      |              |
|       7532 |        1 | A            | BAO_0000218  |          10116 |     9866 | 50597 | N                   |                  1 | Intermediate |                | CHEMBL618654 |           | 2048.0      |              |
|       7533 |        1 | A            | BAO_0000218  |          10116 |     6351 | 50597 | N                   |                  1 | Intermediate |                | CHEMBL618655 |           |             |              |



source_headers: assay_id
src_id
assay_type
bao_format
assay_tax_id
doc_id
target_headers: assay_id
src_id
assay_type
bao_format
assay_tax_id
doc_id
column_mappings: assay_id
assay_id
src_id
src_id
assay_type
assay_type
bao_format
bao_format
assay_tax_id
assay_tax_id
doc_id
doc_id
output: {"column_mappings": [["assay_id", "assay_id"], ["src_id", "src_id"], ["assay_type", "assay_type"], ["bao_format", "bao_format"], ["assay_tax_id", "assay_tax_id"], ["doc_id", "doc_id"], ["description", null], ["assay_test_type", null], ["assay_category", null], ["assay_organism", null], ["assay_strain", null], ["assay_tissue", null], ["assay_cell_type", null], ["assay_subcellular_fraction", null]]}