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 | assay_tissue   | variant_id   | src_assay_id   | assay_cell_type   | chembl_id    | assay_type   | bao_format   | assay_strain   | assay_category   |   confidence_score |   doc_id | description                                                                                                 | assay_test_type   | assay_organism   | assay_tax_id   | assay_subcellular_fraction   |
|-----------:|:---------------|:-------------|:---------------|:------------------|:-------------|:-------------|:-------------|:---------------|:-----------------|-------------------:|---------:|:------------------------------------------------------------------------------------------------------------|:------------------|:-----------------|:---------------|:-----------------------------|
|          1 |                |              |                |                   | CHEMBL615117 | B            | BAO_0000019  |                |                  |                  8 |    11087 | The compound was tested for the in vitro inhibition of platelet 12-lipoxygenase at a concentration of 30 uM |                   |                  |                |                              |
|          2 |                |              |                |                   | CHEMBL615118 | F            | BAO_0000219  |                |                  |                  0 |      684 | Compound was evaluated for its ability to mobilize calcium in 1321NI cells                                  |                   |                  |                |                              |
|          3 |                |              |                |                   | CHEMBL615119 | B            | BAO_0000019  |                |                  |                  0 |    15453 |                                                                                                             |                   |                  |                |                              |
|          4 |                |              |                |                   | CHEMBL615120 | B            | BAO_0000249  |                |                  |                  4 |    17841 | Binding affinity against A2 adenosine receptor in bovine striatal membranes using [3H]CGS-21680             |                   | Bos taurus       | 9913.0         |                              |
|          5 |                |              |                | 143B              | CHEMBL615121 | F            | BAO_0000219  |                |                  |                  1 |    17430 | In vitro cell cytotoxicity against 143-B cell lines (Human osteosarcoma cell line)                          |                   | Homo sapiens     | 9606.0         |                              |
|          6 |                |              |                | 143B              | CHEMBL615122 | F            | BAO_0000219  |                |                  |                  1 |    17430 | In vitro cell cytotoxicity against 143-B cell lines (Human osteosarcoma cell line)                          |                   | Homo sapiens     | 9606.0         |                              |
|          7 |                |              |                | 143B              | CHEMBL615123 | F            | BAO_0000219  |                |                  |                  1 |    13799 | Cytotoxic Activity was evaluated against 143B (TK-) tumor cells                                             |                   | Mus musculus     | 10090.0        |                              |
|          8 |                |              |                | 143B              | CHEMBL615124 | F            | BAO_0000219  |                |                  |                  1 |    17774 | In vitro cell cytotoxicity was determined against 143B cell line                                            |                   | Homo sapiens     | 9606.0         |                              |
|          9 |                |              |                | 143B              | CHEMBL615125 | F            | BAO_0000219  |                |                  |                  1 |     3801 | Inhibitory activity against tumor osteosarcoma cell line 143B after 72 hr continuous exposure to compound   |                   | Homo sapiens     | 9606.0         |                              |
|         10 |                |              |                | 143B              | CHEMBL615126 | F            | BAO_0000219  |                |                  |                  1 |    17430 | In vitro cell cytotoxicity against 143B-LTK cell lines expressed in HSV-1 TK                                |                   | Homo sapiens     | 9606.0         |                              |

TableB:
|   assays_assay_id | assays_assay_tissue   | assays_variant_id   | assays_src_assay_id   | assays_assay_cell_type   | assays_chembl_id   | assays_assay_type   | assays_bao_format   | assays_assay_strain   | assays_assay_category   |   assays_confidence_score |   assays_tid | assays_relationship_type   | assays_curated_by   |   assays_src_id | assays_cell_id   | assays_tissue_id   |
|------------------:|:----------------------|:--------------------|:----------------------|:-------------------------|:-------------------|:--------------------|:--------------------|:----------------------|:------------------------|--------------------------:|-------------:|:---------------------------|:--------------------|----------------:|:-----------------|:-------------------|
|              7524 | Kidney                |                     |                       |                          | CHEMBL618647       | A                   | BAO_0000218         |                       |                         |                         1 |        50597 | N                          | Intermediate        |               1 |                  | 2113.0             |
|              7525 | Kidney                |                     |                       |                          | CHEMBL618648       | A                   | BAO_0000218         |                       |                         |                         1 |        50597 | N                          | Intermediate        |               1 |                  | 2113.0             |
|              7526 | Kidney                |                     |                       |                          | CHEMBL618649       | A                   | BAO_0000218         |                       |                         |                         1 |        50597 | N                          | Intermediate        |               1 |                  | 2113.0             |
|              7527 | Liver                 |                     |                       |                          | CHEMBL618650       | A                   | BAO_0000218         |                       |                         |                         1 |        50597 | N                          | Intermediate        |               1 |                  | 2107.0             |
|              7528 | Liver                 |                     |                       |                          | CHEMBL618651       | A                   | BAO_0000218         |                       |                         |                         1 |        50597 | N                          | Intermediate        |               1 |                  | 2107.0             |
|              7529 | Liver                 |                     |                       |                          | CHEMBL876497       | A                   | BAO_0000218         |                       |                         |                         1 |        50597 | N                          | Intermediate        |               1 |                  | 2107.0             |
|              7530 | Lung                  |                     |                       |                          | CHEMBL618652       | A                   | BAO_0000218         |                       |                         |                         1 |        50597 | N                          | Intermediate        |               1 |                  | 2048.0             |
|              7531 | Lung                  |                     |                       |                          | CHEMBL618653       | A                   | BAO_0000218         |                       |                         |                         1 |        50597 | N                          | Intermediate        |               1 |                  | 2048.0             |
|              7532 | Lung                  |                     |                       |                          | CHEMBL618654       | A                   | BAO_0000218         |                       |                         |                         1 |        50597 | N                          | Intermediate        |               1 |                  | 2048.0             |
|              7533 |                       |                     |                       |                          | CHEMBL618655       | A                   | BAO_0000218         |                       |                         |                         1 |        50597 | N                          | Intermediate        |               1 |                  |                    |



source_headers: assay_id
assay_tissue
variant_id
src_assay_id
assay_cell_type
chembl_id
assay_type
bao_format
assay_strain
assay_category
confidence_score
target_headers: assays_assay_id
assays_assay_tissue
assays_variant_id
assays_src_assay_id
assays_assay_cell_type
assays_chembl_id
assays_assay_type
assays_bao_format
assays_assay_strain
assays_assay_category
assays_confidence_score
column_mappings: assay_id
assays_assay_id
assay_tissue
assays_assay_tissue
variant_id
assays_variant_id
src_assay_id
assays_src_assay_id
assay_cell_type
assays_assay_cell_type
chembl_id
assays_chembl_id
assay_type
assays_assay_type
bao_format
assays_bao_format
assay_strain
assays_assay_strain
assay_category
assays_assay_category
confidence_score
assays_confidence_score
output: {"column_mappings": [["assay_id", "assays_assay_id"], ["assay_tissue", "assays_assay_tissue"], ["variant_id", "assays_variant_id"], ["src_assay_id", "assays_src_assay_id"], ["assay_cell_type", "assays_assay_cell_type"], ["chembl_id", "assays_chembl_id"], ["assay_type", "assays_assay_type"], ["bao_format", "assays_bao_format"], ["assay_strain", "assays_assay_strain"], ["assay_category", "assays_assay_category"], ["confidence_score", "assays_confidence_score"], ["doc_id", null], ["description", null], ["assay_test_type", null], ["assay_organism", null], ["assay_tax_id", null], ["assay_subcellular_fraction", null]]}