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 | variant_id   | assay_tissue   |    tid | tissue_id   | src_assay_id   | assay_strain   | cell_id   | relationship_type   | assay_test_type   | curated_by   |   doc_id | description                                                                                                 | assay_type   | assay_category   | assay_organism   | assay_tax_id   |
|-----------:|:-------------|:---------------|-------:|:------------|:---------------|:---------------|:----------|:--------------------|:------------------|:-------------|---------:|:------------------------------------------------------------------------------------------------------------|:-------------|:-----------------|:-----------------|:---------------|
|          1 |              |                |  12052 |             |                |                |           | H                   |                   | Autocuration |    11087 | The compound was tested for the in vitro inhibition of platelet 12-lipoxygenase at a concentration of 30 uM | B            |                  |                  |                |
|          2 |              |                |  22226 |             |                |                |           | U                   |                   | Autocuration |      684 | Compound was evaluated for its ability to mobilize calcium in 1321NI cells                                  | F            |                  |                  |                |
|          3 |              |                |  22226 |             |                |                |           | U                   |                   | Autocuration |    15453 |                                                                                                             | B            |                  |                  |                |
|          4 |              |                | 104729 |             |                |                |           | H                   |                   | Autocuration |    17841 | Binding affinity against A2 adenosine receptor in bovine striatal membranes using [3H]CGS-21680             | B            |                  | Bos taurus       | 9913.0         |
|          5 |              |                |  80001 |             |                |                | 163.0     | N                   |                   | Intermediate |    17430 | In vitro cell cytotoxicity against 143-B cell lines (Human osteosarcoma cell line)                          | F            |                  | Homo sapiens     | 9606.0         |
|          6 |              |                |  80001 |             |                |                | 163.0     | N                   |                   | Intermediate |    17430 | In vitro cell cytotoxicity against 143-B cell lines (Human osteosarcoma cell line)                          | F            |                  | Homo sapiens     | 9606.0         |
|          7 |              |                |  80001 |             |                |                | 163.0     | N                   |                   | Intermediate |    13799 | Cytotoxic Activity was evaluated against 143B (TK-) tumor cells                                             | F            |                  | Mus musculus     | 10090.0        |
|          8 |              |                |  80001 |             |                |                | 163.0     | N                   |                   | Expert       |    17774 | In vitro cell cytotoxicity was determined against 143B cell line                                            | F            |                  | Homo sapiens     | 9606.0         |
|          9 |              |                |  80001 |             |                |                | 163.0     | N                   |                   | Intermediate |     3801 | Inhibitory activity against tumor osteosarcoma cell line 143B after 72 hr continuous exposure to compound   | F            |                  | Homo sapiens     | 9606.0         |
|         10 |              |                |  80001 |             |                |                | 163.0     | N                   |                   | Intermediate |    17430 | In vitro cell cytotoxicity against 143B-LTK cell lines expressed in HSV-1 TK                                | F            |                  | Homo sapiens     | 9606.0         |

TableB:
|   assay_id | variant_id   | assay_tissue   |   tid | tissue_id   | src_assay_id   | assay_strain   | cell_id   | relationship_type   | assay_test_type   | curated_by   | assay_cell_type   | assay_subcellular_fraction   |   confidence_score |   src_id | chembl_id    | bao_format   |
|-----------:|:-------------|:---------------|------:|:------------|:---------------|:---------------|:----------|:--------------------|:------------------|:-------------|:------------------|:-----------------------------|-------------------:|---------:|:-------------|:-------------|
|       7524 |              | Kidney         | 50597 | 2113.0      |                |                |           | N                   | In vivo           | Intermediate |                   |                              |                  1 |        1 | CHEMBL618647 | BAO_0000218  |
|       7525 |              | Kidney         | 50597 | 2113.0      |                |                |           | N                   | In vivo           | Intermediate |                   |                              |                  1 |        1 | CHEMBL618648 | BAO_0000218  |
|       7526 |              | Kidney         | 50597 | 2113.0      |                |                |           | N                   | In vivo           | Intermediate |                   |                              |                  1 |        1 | CHEMBL618649 | BAO_0000218  |
|       7527 |              | Liver          | 50597 | 2107.0      |                |                |           | N                   | In vivo           | Intermediate |                   |                              |                  1 |        1 | CHEMBL618650 | BAO_0000218  |
|       7528 |              | Liver          | 50597 | 2107.0      |                |                |           | N                   | In vivo           | Intermediate |                   |                              |                  1 |        1 | CHEMBL618651 | BAO_0000218  |
|       7529 |              | Liver          | 50597 | 2107.0      |                |                |           | N                   | In vivo           | Intermediate |                   |                              |                  1 |        1 | CHEMBL876497 | BAO_0000218  |
|       7530 |              | Lung           | 50597 | 2048.0      |                |                |           | N                   | In vivo           | Intermediate |                   |                              |                  1 |        1 | CHEMBL618652 | BAO_0000218  |
|       7531 |              | Lung           | 50597 | 2048.0      |                |                |           | N                   | In vivo           | Intermediate |                   |                              |                  1 |        1 | CHEMBL618653 | BAO_0000218  |
|       7532 |              | Lung           | 50597 | 2048.0      |                |                |           | N                   | In vivo           | Intermediate |                   |                              |                  1 |        1 | CHEMBL618654 | BAO_0000218  |
|       7533 |              |                | 50597 |             |                |                |           | N                   |                   | Intermediate |                   |                              |                  1 |        1 | CHEMBL618655 | BAO_0000218  |



source_headers: assay_id
variant_id
assay_tissue
tid
tissue_id
src_assay_id
assay_strain
cell_id
relationship_type
assay_test_type
curated_by
target_headers: assay_id
variant_id
assay_tissue
tid
tissue_id
src_assay_id
assay_strain
cell_id
relationship_type
assay_test_type
curated_by
column_mappings: assay_id
assay_id
variant_id
variant_id
assay_tissue
assay_tissue
tid
tid
tissue_id
tissue_id
src_assay_id
src_assay_id
assay_strain
assay_strain
cell_id
cell_id
relationship_type
relationship_type
assay_test_type
assay_test_type
curated_by
curated_by
output: {"column_mappings": [["assay_id", "assay_id"], ["variant_id", "variant_id"], ["assay_tissue", "assay_tissue"], ["tid", "tid"], ["tissue_id", "tissue_id"], ["src_assay_id", "src_assay_id"], ["assay_strain", "assay_strain"], ["cell_id", "cell_id"], ["relationship_type", "relationship_type"], ["assay_test_type", "assay_test_type"], ["curated_by", "curated_by"], ["doc_id", null], ["description", null], ["assay_type", null], ["assay_category", null], ["assay_organism", null], ["assay_tax_id", null]]}