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 | bao_format   | assay_type   |    tid | assay_test_type   | curated_by   |   doc_id | description                                                                                                 | assay_category   | assay_organism   | assay_tax_id   | assay_strain   | assay_tissue   | assay_cell_type   |
|-----------:|:-------------|:-------------|-------:|:------------------|:-------------|---------:|:------------------------------------------------------------------------------------------------------------|:-----------------|:-----------------|:---------------|:---------------|:---------------|:------------------|
|          1 | BAO0900029   | B            |  12052 |                   | qutoc8ration |    11087 | The compound was tested for the in vitro inhibition of platelet 12-lipoxygenase at a concentration of 30 uM |                  |                  |                |                |                |                   |
|          2 | BwO00002w9   | F            |  22226 |                   | Aktosuration |      684 | Compound was evaluated for its ability to mobilize calcium in 1321NI cells                                  |                  |                  |                |                |                |                   |
|          3 | nA90000019   | B            |  22226 |                   | Autockratiln |    15453 |                                                                                                             |                  |                  |                |                |                |                   |
|          4 | BAOo000w49   | B            | 104729 |                   | Aut9curat8on |    17841 | Binding affinity against A2 adenosine receptor in bovine striatal membranes using [3H]CGS-21680             |                  | Bos taurus       | 9913.0         |                |                |                   |
|          5 | BAO0000e29   | F            |  80001 |                   | Intermewiqte |    17430 | In vitro cell cytotoxicity against 143-B cell lines (Human osteosarcoma cell line)                          |                  | Homo sapiens     | 9606.0         |                |                | 143B              |
|          6 | BAO0099219   | F            |  80001 |                   | Interjddiate |    17430 | In vitro cell cytotoxicity against 143-B cell lines (Human osteosarcoma cell line)                          |                  | Homo sapiens     | 9606.0         |                |                | 143B              |
|          7 | BqO9000219   | F            |  80001 |                   | Inte3mediaye |    13799 | Cytotoxic Activity was evaluated against 143B (TK-) tumor cells                                             |                  | Mus musculus     | 10090.0        |                |                | 143B              |
|          8 | Bxp0000219   | F            |  80001 |                   | Exp4rt       |    17774 | In vitro cell cytotoxicity was determined against 143B cell line                                            |                  | Homo sapiens     | 9606.0         |                |                | 143B              |
|          9 | BxO000p219   | F            |  80001 |                   | Intdrmedoate |     3801 | Inhibitory activity against tumor osteosarcoma cell line 143B after 72 hr continuous exposure to compound   |                  | Homo sapiens     | 9606.0         |                |                | 143B              |
|         10 | BAO900021p   | F            |  80001 |                   | 9nternediate |    17430 | In vitro cell cytotoxicity against 143B-LTK cell lines expressed in HSV-1 TK                                |                  | Homo sapiens     | 9606.0         |                |                | 143B              |

TableB:
|   assays_assay_id | assays_bao_format   | assays_assay_type   |   assays_tid | assays_assay_test_type   | assays_curated_by   | assays_assay_subcellular_fraction   | assays_relationship_type   |   assays_confidence_score |   assays_src_id | assays_src_assay_id   | assays_chembl_id   | assays_cell_id   | assays_tissue_id   | assays_variant_id   |
|------------------:|:--------------------|:--------------------|-------------:|:-------------------------|:--------------------|:------------------------------------|:---------------------------|--------------------------:|----------------:|:----------------------|:-------------------|:-----------------|:-------------------|:--------------------|
|                 1 | BAO_0000019         | B                   |        12052 |                          | Autocuration        |                                     | H                          |                         8 |               1 |                       | CHEMBL615117       |                  |                    |                     |
|                 2 | BAO_0000219         | F                   |        22226 |                          | Autocuration        |                                     | U                          |                         0 |               1 |                       | CHEMBL615118       |                  |                    |                     |
|                 3 | BAO_0000019         | B                   |        22226 |                          | Autocuration        |                                     | U                          |                         0 |               1 |                       | CHEMBL615119       |                  |                    |                     |
|                 4 | BAO_0000249         | B                   |       104729 |                          | Autocuration        |                                     | H                          |                         4 |               1 |                       | CHEMBL615120       |                  |                    |                     |
|                 5 | BAO_0000219         | F                   |        80001 |                          | Intermediate        |                                     | N                          |                         1 |               1 |                       | CHEMBL615121       | 163.0            |                    |                     |
|                 6 | BAO_0000219         | F                   |        80001 |                          | Intermediate        |                                     | N                          |                         1 |               1 |                       | CHEMBL615122       | 163.0            |                    |                     |
|                 7 | BAO_0000219         | F                   |        80001 |                          | Intermediate        |                                     | N                          |                         1 |               1 |                       | CHEMBL615123       | 163.0            |                    |                     |
|                 8 | BAO_0000219         | F                   |        80001 |                          | Expert              |                                     | N                          |                         1 |               1 |                       | CHEMBL615124       | 163.0            |                    |                     |
|                 9 | BAO_0000219         | F                   |        80001 |                          | Intermediate        |                                     | N                          |                         1 |               1 |                       | CHEMBL615125       | 163.0            |                    |                     |
|                10 | BAO_0000219         | F                   |        80001 |                          | Intermediate        |                                     | N                          |                         1 |               1 |                       | CHEMBL615126       | 163.0            |                    |                     |



source_headers: assay_id
bao_format
assay_type
tid
assay_test_type
curated_by
target_headers: assays_assay_id
assays_bao_format
assays_assay_type
assays_tid
assays_assay_test_type
assays_curated_by
column_mappings: assay_id
assays_assay_id
bao_format
assays_bao_format
assay_type
assays_assay_type
tid
assays_tid
assay_test_type
assays_assay_test_type
curated_by
assays_curated_by
output: {"column_mappings": [["assay_id", "assays_assay_id"], ["bao_format", "assays_bao_format"], ["assay_type", "assays_assay_type"], ["tid", "assays_tid"], ["assay_test_type", "assays_assay_test_type"], ["curated_by", "assays_curated_by"], ["doc_id", null], ["description", null], ["assay_category", null], ["assay_organism", null], ["assay_tax_id", null], ["assay_strain", null], ["assay_tissue", null], ["assay_cell_type", null]]}