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 | cell_id   | curated_by   | assay_category   | variant_id   | assay_tissue   |   doc_id | description                                                                                                 | assay_type   | assay_test_type   | assay_organism   | assay_tax_id   | assay_strain   | assay_cell_type   |
|-----------:|:----------|:-------------|:-----------------|:-------------|:---------------|---------:|:------------------------------------------------------------------------------------------------------------|:-------------|:------------------|:-----------------|:---------------|:---------------|:------------------|
|          1 |           | Autosurat8on |                  |              |                |    11087 | The compound was tested for the in vitro inhibition of platelet 12-lipoxygenase at a concentration of 30 uM | B            |                   |                  |                |                |                   |
|          2 |           | Aurocurat9on |                  |              |                |      684 | Compound was evaluated for its ability to mobilize calcium in 1321NI cells                                  | F            |                   |                  |                |                |                   |
|          3 |           | Aut9curqtion |                  |              |                |    15453 |                                                                                                             | B            |                   |                  |                |                |                   |
|          4 |           | wutocurati9n |                  |              |                |    17841 | Binding affinity against A2 adenosine receptor in bovine striatal membranes using [3H]CGS-21680             | B            |                   | Bos taurus       | 9913.0         |                |                   |
|          5 | 532.0     | Ijtegmediate |                  |              |                |    17430 | In vitro cell cytotoxicity against 143-B cell lines (Human osteosarcoma cell line)                          | F            |                   | Homo sapiens     | 9606.0         |                | 143B              |
|          6 | 728.0     | Inferm2diate |                  |              |                |    17430 | In vitro cell cytotoxicity against 143-B cell lines (Human osteosarcoma cell line)                          | F            |                   | Homo sapiens     | 9606.0         |                | 143B              |
|          7 | 585.0     | Igtermed9ate |                  |              |                |    13799 | Cytotoxic Activity was evaluated against 143B (TK-) tumor cells                                             | F            |                   | Mus musculus     | 10090.0        |                | 143B              |
|          8 | 597.0     | Exp2rt       |                  |              |                |    17774 | In vitro cell cytotoxicity was determined against 143B cell line                                            | F            |                   | Homo sapiens     | 9606.0         |                | 143B              |
|          9 | 772.0     | Igterkediate |                  |              |                |     3801 | Inhibitory activity against tumor osteosarcoma cell line 143B after 72 hr continuous exposure to compound   | F            |                   | Homo sapiens     | 9606.0         |                | 143B              |
|         10 | 795.0     | Interhewiate |                  |              |                |    17430 | In vitro cell cytotoxicity against 143B-LTK cell lines expressed in HSV-1 TK                                | F            |                   | Homo sapiens     | 9606.0         |                | 143B              |

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



source_headers: assay_id
cell_id
curated_by
assay_category
variant_id
assay_tissue
target_headers: assays_assay_id
assays_cell_id
assays_curated_by
assays_assay_category
assays_variant_id
assays_assay_tissue
column_mappings: assay_id
assays_assay_id
cell_id
assays_cell_id
curated_by
assays_curated_by
assay_category
assays_assay_category
variant_id
assays_variant_id
assay_tissue
assays_assay_tissue
output: {"column_mappings": [["assay_id", "assays_assay_id"], ["cell_id", "assays_cell_id"], ["curated_by", "assays_curated_by"], ["assay_category", "assays_assay_category"], ["variant_id", "assays_variant_id"], ["assay_tissue", "assays_assay_tissue"], ["doc_id", null], ["description", null], ["assay_type", null], ["assay_test_type", null], ["assay_organism", null], ["assay_tax_id", null], ["assay_strain", null], ["assay_cell_type", null]]}