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 | relationship_type   | assay_test_type   | assay_tax_id   | src_assay_id   | curated_by   | chembl_id    |   doc_id | assay_organism   | variant_id   | description                                                                                                 | assay_type   | assay_category   | assay_strain   | assay_tissue   | assay_cell_type   |
|-----------:|---------:|:--------------------|:------------------|:---------------|:---------------|:-------------|:-------------|---------:|:-----------------|:-------------|:------------------------------------------------------------------------------------------------------------|:-------------|:-----------------|:---------------|:---------------|:------------------|
|          1 |        1 | H                   |                   |                |                | zutochration | CgEnBL615117 |    11087 |                  |              | The compound was tested for the in vitro inhibition of platelet 12-lipoxygenase at a concentration of 30 uM | B            |                  |                |                |                   |
|          2 |        1 | U                   |                   |                |                | Autocjratiln | CuEMBL715118 |      684 |                  |              | Compound was evaluated for its ability to mobilize calcium in 1321NI cells                                  | F            |                  |                |                |                   |
|          3 |        1 | U                   |                   |                |                | zut9curation | CHEMfL61r119 |    15453 |                  |              |                                                                                                             | B            |                  |                |                |                   |
|          4 |        1 | H                   |                   | 42228.0        |                | Autofurati0n | CHdMBL61y120 |    17841 | Bostwurus        |              | Binding affinity against A2 adenosine receptor in bovine striatal membranes using [3H]CGS-21680             | B            |                  |                |                |                   |
|          5 |        1 | N                   |                   | 106243.0       |                | untermfdiate | CHEMvL615111 |    17430 | Homoswpiems      |              | In vitro cell cytotoxicity against 143-B cell lines (Human osteosarcoma cell line)                          | F            |                  |                |                | 143B              |
|          6 |        1 | N                   |                   | 17200.0        |                | 8ntermsdiate | CHEMBL615q2q |    17430 | Hom9sqpiens      |              | In vitro cell cytotoxicity against 143-B cell lines (Human osteosarcoma cell line)                          | F            |                  |                |                | 143B              |
|          7 |        1 | N                   |                   | 35374.0        |                | Intermer8ate | CHEMBL71512w |    13799 | jushusculus      |              | Cytotoxic Activity was evaluated against 143B (TK-) tumor cells                                             | F            |                  |                |                | 143B              |
|          8 |        1 | N                   |                   | 39513.0        |                | Expegt       | CHEMBL6152q4 |    17774 | Homoswliens      |              | In vitro cell cytotoxicity was determined against 143B cell line                                            | F            |                  |                |                | 143B              |
|          9 |        1 | N                   |                   | 31282.0        |                | Ijtegmediate | CHEMBp61y125 |     3801 | Honlsapiens      |              | Inhibitory activity against tumor osteosarcoma cell line 143B after 72 hr continuous exposure to compound   | F            |                  |                |                | 143B              |
|         10 |        1 | N                   |                   | 6424.0         |                | Igtermedixte | CHEMBi61r126 |    17430 | Hompsapienz      |              | In vitro cell cytotoxicity against 143B-LTK cell lines expressed in HSV-1 TK                                | F            |                  |                |                | 143B              |

TableB:
|   assays_assay_id |   assays_src_id | assays_relationship_type   | assays_assay_test_type   |   assays_assay_tax_id | assays_src_assay_id   | assays_curated_by   | assays_chembl_id   |   assays_doc_id | assays_assay_organism   | assays_variant_id   | assays_assay_subcellular_fraction   |   assays_tid |   assays_confidence_score | assays_cell_id   | assays_bao_format   | assays_tissue_id   |
|------------------:|----------------:|:---------------------------|:-------------------------|----------------------:|:----------------------|:--------------------|:-------------------|----------------:|:------------------------|:--------------------|:------------------------------------|-------------:|--------------------------:|:-----------------|:--------------------|:-------------------|
|              7524 |               1 | N                          | In vivo                  |                 10116 |                       | Intermediate        | CHEMBL618647       |            9866 | Rattus norvegicus       |                     |                                     |        50597 |                         1 |                  | BAO_0000218         | 2113.0             |
|              7525 |               1 | N                          | In vivo                  |                 10116 |                       | Intermediate        | CHEMBL618648       |            9866 | Rattus norvegicus       |                     |                                     |        50597 |                         1 |                  | BAO_0000218         | 2113.0             |
|              7526 |               1 | N                          | In vivo                  |                 10116 |                       | Intermediate        | CHEMBL618649       |            9866 | Rattus norvegicus       |                     |                                     |        50597 |                         1 |                  | BAO_0000218         | 2113.0             |
|              7527 |               1 | N                          | In vivo                  |                 10116 |                       | Intermediate        | CHEMBL618650       |            9866 | Rattus norvegicus       |                     |                                     |        50597 |                         1 |                  | BAO_0000218         | 2107.0             |
|              7528 |               1 | N                          | In vivo                  |                 10116 |                       | Intermediate        | CHEMBL618651       |            9866 | Rattus norvegicus       |                     |                                     |        50597 |                         1 |                  | BAO_0000218         | 2107.0             |
|              7529 |               1 | N                          | In vivo                  |                 10116 |                       | Intermediate        | CHEMBL876497       |            9866 | Rattus norvegicus       |                     |                                     |        50597 |                         1 |                  | BAO_0000218         | 2107.0             |
|              7530 |               1 | N                          | In vivo                  |                 10116 |                       | Intermediate        | CHEMBL618652       |            9866 | Rattus norvegicus       |                     |                                     |        50597 |                         1 |                  | BAO_0000218         | 2048.0             |
|              7531 |               1 | N                          | In vivo                  |                 10116 |                       | Intermediate        | CHEMBL618653       |            9866 | Rattus norvegicus       |                     |                                     |        50597 |                         1 |                  | BAO_0000218         | 2048.0             |
|              7532 |               1 | N                          | In vivo                  |                 10116 |                       | Intermediate        | CHEMBL618654       |            9866 | Rattus norvegicus       |                     |                                     |        50597 |                         1 |                  | BAO_0000218         | 2048.0             |
|              7533 |               1 | N                          |                          |                 10116 |                       | Intermediate        | CHEMBL618655       |            6351 | Rattus norvegicus       |                     |                                     |        50597 |                         1 |                  | BAO_0000218         |                    |



source_headers: assay_id
src_id
relationship_type
assay_test_type
assay_tax_id
src_assay_id
curated_by
chembl_id
doc_id
assay_organism
variant_id
target_headers: assays_assay_id
assays_src_id
assays_relationship_type
assays_assay_test_type
assays_assay_tax_id
assays_src_assay_id
assays_curated_by
assays_chembl_id
assays_doc_id
assays_assay_organism
assays_variant_id
column_mappings: assay_id
assays_assay_id
src_id
assays_src_id
relationship_type
assays_relationship_type
assay_test_type
assays_assay_test_type
assay_tax_id
assays_assay_tax_id
src_assay_id
assays_src_assay_id
curated_by
assays_curated_by
chembl_id
assays_chembl_id
doc_id
assays_doc_id
assay_organism
assays_assay_organism
variant_id
assays_variant_id
output: {"column_mappings": [["assay_id", "assays_assay_id"], ["src_id", "assays_src_id"], ["relationship_type", "assays_relationship_type"], ["assay_test_type", "assays_assay_test_type"], ["assay_tax_id", "assays_assay_tax_id"], ["src_assay_id", "assays_src_assay_id"], ["curated_by", "assays_curated_by"], ["chembl_id", "assays_chembl_id"], ["doc_id", "assays_doc_id"], ["assay_organism", "assays_assay_organism"], ["variant_id", "assays_variant_id"], ["description", null], ["assay_type", null], ["assay_category", null], ["assay_strain", null], ["assay_tissue", null], ["assay_cell_type", null]]}