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 | curated_by   | assay_test_type   | assay_strain   | assay_type   | relationship_type   |   doc_id | description                                                                                                 | assay_category   | assay_organism   | assay_tax_id   | assay_tissue   | assay_cell_type   | assay_subcellular_fraction   |
|-----------:|:-------------|:------------------|:---------------|:-------------|:--------------------|---------:|:------------------------------------------------------------------------------------------------------------|:-----------------|:-----------------|:---------------|:---------------|:------------------|:-----------------------------|
|          1 | Autocuration |                   |                | B            | H                   |    11087 | The compound was tested for the in vitro inhibition of platelet 12-lipoxygenase at a concentration of 30 uM |                  |                  |                |                |                   |                              |
|          2 | Autocuration |                   |                | F            | U                   |      684 | Compound was evaluated for its ability to mobilize calcium in 1321NI cells                                  |                  |                  |                |                |                   |                              |
|          3 | Autocuration |                   |                | B            | U                   |    15453 |                                                                                                             |                  |                  |                |                |                   |                              |
|          4 | Autocuration |                   |                | B            | H                   |    17841 | Binding affinity against A2 adenosine receptor in bovine striatal membranes using [3H]CGS-21680             |                  | Bos taurus       | 9913.0         |                |                   |                              |
|          5 | Intermediate |                   |                | F            | N                   |    17430 | In vitro cell cytotoxicity against 143-B cell lines (Human osteosarcoma cell line)                          |                  | Homo sapiens     | 9606.0         |                | 143B              |                              |
|          6 | Intermediate |                   |                | F            | N                   |    17430 | In vitro cell cytotoxicity against 143-B cell lines (Human osteosarcoma cell line)                          |                  | Homo sapiens     | 9606.0         |                | 143B              |                              |
|          7 | Intermediate |                   |                | F            | N                   |    13799 | Cytotoxic Activity was evaluated against 143B (TK-) tumor cells                                             |                  | Mus musculus     | 10090.0        |                | 143B              |                              |
|          8 | Expert       |                   |                | F            | N                   |    17774 | In vitro cell cytotoxicity was determined against 143B cell line                                            |                  | Homo sapiens     | 9606.0         |                | 143B              |                              |
|          9 | Intermediate |                   |                | F            | N                   |     3801 | Inhibitory activity against tumor osteosarcoma cell line 143B after 72 hr continuous exposure to compound   |                  | Homo sapiens     | 9606.0         |                | 143B              |                              |
|         10 | Intermediate |                   |                | F            | N                   |    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_curated_by   | assays_assay_test_type   | assays_assay_strain   | assays_assay_type   | assays_relationship_type   |   assays_tid |   assays_confidence_score |   assays_src_id | assays_src_assay_id   | assays_chembl_id   | assays_cell_id   | assays_bao_format   | assays_tissue_id   | assays_variant_id   |
|------------------:|:--------------------|:-------------------------|:----------------------|:--------------------|:---------------------------|-------------:|--------------------------:|----------------:|:----------------------|:-------------------|:-----------------|:--------------------|:-------------------|:--------------------|
|              7524 | Intermediate        | In vivo                  |                       | A                   | N                          |        50597 |                         1 |               1 |                       | CHEMBL618647       |                  | BAO_0000218         | 2113.0             |                     |
|              7525 | Intermediate        | In vivo                  |                       | A                   | N                          |        50597 |                         1 |               1 |                       | CHEMBL618648       |                  | BAO_0000218         | 2113.0             |                     |
|              7526 | Intermediate        | In vivo                  |                       | A                   | N                          |        50597 |                         1 |               1 |                       | CHEMBL618649       |                  | BAO_0000218         | 2113.0             |                     |
|              7527 | Intermediate        | In vivo                  |                       | A                   | N                          |        50597 |                         1 |               1 |                       | CHEMBL618650       |                  | BAO_0000218         | 2107.0             |                     |
|              7528 | Intermediate        | In vivo                  |                       | A                   | N                          |        50597 |                         1 |               1 |                       | CHEMBL618651       |                  | BAO_0000218         | 2107.0             |                     |
|              7529 | Intermediate        | In vivo                  |                       | A                   | N                          |        50597 |                         1 |               1 |                       | CHEMBL876497       |                  | BAO_0000218         | 2107.0             |                     |
|              7530 | Intermediate        | In vivo                  |                       | A                   | N                          |        50597 |                         1 |               1 |                       | CHEMBL618652       |                  | BAO_0000218         | 2048.0             |                     |
|              7531 | Intermediate        | In vivo                  |                       | A                   | N                          |        50597 |                         1 |               1 |                       | CHEMBL618653       |                  | BAO_0000218         | 2048.0             |                     |
|              7532 | Intermediate        | In vivo                  |                       | A                   | N                          |        50597 |                         1 |               1 |                       | CHEMBL618654       |                  | BAO_0000218         | 2048.0             |                     |
|              7533 | Intermediate        |                          |                       | A                   | N                          |        50597 |                         1 |               1 |                       | CHEMBL618655       |                  | BAO_0000218         |                    |                     |



source_headers: assay_id
curated_by
assay_test_type
assay_strain
assay_type
relationship_type
target_headers: assays_assay_id
assays_curated_by
assays_assay_test_type
assays_assay_strain
assays_assay_type
assays_relationship_type
column_mappings: assay_id
assays_assay_id
curated_by
assays_curated_by
assay_test_type
assays_assay_test_type
assay_strain
assays_assay_strain
assay_type
assays_assay_type
relationship_type
assays_relationship_type
output: {"column_mappings": [["assay_id", "assays_assay_id"], ["curated_by", "assays_curated_by"], ["assay_test_type", "assays_assay_test_type"], ["assay_strain", "assays_assay_strain"], ["assay_type", "assays_assay_type"], ["relationship_type", "assays_relationship_type"], ["doc_id", null], ["description", null], ["assay_category", null], ["assay_organism", null], ["assay_tax_id", null], ["assay_tissue", null], ["assay_cell_type", null], ["assay_subcellular_fraction", null]]}