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

TableB:
|   assays_assay_id |   assays_src_id | assays_tissue_id   |   assays_confidence_score |   assays_doc_id | assays_assay_organism   | assays_assay_subcellular_fraction   |   assays_tid | assays_relationship_type   | assays_curated_by   | assays_src_assay_id   | assays_chembl_id   | assays_cell_id   | assays_bao_format   | assays_variant_id   |
|------------------:|----------------:|:-------------------|--------------------------:|----------------:|:------------------------|:------------------------------------|-------------:|:---------------------------|:--------------------|:----------------------|:-------------------|:-----------------|:--------------------|:--------------------|
|                 1 |               1 |                    |                         8 |           11087 |                         |                                     |        12052 | H                          | Autocuration        |                       | CHEMBL615117       |                  | BAO_0000019         |                     |
|                 2 |               1 |                    |                         0 |             684 |                         |                                     |        22226 | U                          | Autocuration        |                       | CHEMBL615118       |                  | BAO_0000219         |                     |
|                 3 |               1 |                    |                         0 |           15453 |                         |                                     |        22226 | U                          | Autocuration        |                       | CHEMBL615119       |                  | BAO_0000019         |                     |
|                 4 |               1 |                    |                         4 |           17841 | Bos taurus              |                                     |       104729 | H                          | Autocuration        |                       | CHEMBL615120       |                  | BAO_0000249         |                     |
|                 5 |               1 |                    |                         1 |           17430 | Homo sapiens            |                                     |        80001 | N                          | Intermediate        |                       | CHEMBL615121       | 163.0            | BAO_0000219         |                     |
|                 6 |               1 |                    |                         1 |           17430 | Homo sapiens            |                                     |        80001 | N                          | Intermediate        |                       | CHEMBL615122       | 163.0            | BAO_0000219         |                     |
|                 7 |               1 |                    |                         1 |           13799 | Mus musculus            |                                     |        80001 | N                          | Intermediate        |                       | CHEMBL615123       | 163.0            | BAO_0000219         |                     |
|                 8 |               1 |                    |                         1 |           17774 | Homo sapiens            |                                     |        80001 | N                          | Expert              |                       | CHEMBL615124       | 163.0            | BAO_0000219         |                     |
|                 9 |               1 |                    |                         1 |            3801 | Homo sapiens            |                                     |        80001 | N                          | Intermediate        |                       | CHEMBL615125       | 163.0            | BAO_0000219         |                     |
|                10 |               1 |                    |                         1 |           17430 | Homo sapiens            |                                     |        80001 | N                          | Intermediate        |                       | CHEMBL615126       | 163.0            | BAO_0000219         |                     |



source_headers: assay_id
src_id
tissue_id
confidence_score
doc_id
assay_organism
target_headers: assays_assay_id
assays_src_id
assays_tissue_id
assays_confidence_score
assays_doc_id
assays_assay_organism
column_mappings: assay_id
assays_assay_id
src_id
assays_src_id
tissue_id
assays_tissue_id
confidence_score
assays_confidence_score
doc_id
assays_doc_id
assay_organism
assays_assay_organism
output: {"column_mappings": [["assay_id", "assays_assay_id"], ["src_id", "assays_src_id"], ["tissue_id", "assays_tissue_id"], ["confidence_score", "assays_confidence_score"], ["doc_id", "assays_doc_id"], ["assay_organism", "assays_assay_organism"], ["description", null], ["assay_type", null], ["assay_test_type", null], ["assay_category", null], ["assay_tax_id", null], ["assay_strain", null], ["assay_tissue", null], ["assay_cell_type", null]]}