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 | assay_organism   |    tid | assay_category   | assay_tissue   |   src_id | assay_type   | tissue_id   | variant_id   | cell_id   | chembl_id    | assay_tax_id   | src_assay_id   |   doc_id | assay_strain   | assay_cell_type   | description                                                                                                 | assay_test_type   | assay_subcellular_fraction   |
|-----------:|:-----------------|-------:|:-----------------|:---------------|---------:|:-------------|:------------|:-------------|:----------|:-------------|:---------------|:---------------|---------:|:---------------|:------------------|:------------------------------------------------------------------------------------------------------------|:------------------|:-----------------------------|
|          1 |                  |  12052 |                  |                |        1 | B            |             |              |           | CHEMBL615117 |                |                |    11087 |                |                   | The compound was tested for the in vitro inhibition of platelet 12-lipoxygenase at a concentration of 30 uM |                   |                              |
|          2 |                  |  22226 |                  |                |        1 | F            |             |              |           | CHEMBL615118 |                |                |      684 |                |                   | Compound was evaluated for its ability to mobilize calcium in 1321NI cells                                  |                   |                              |
|          3 |                  |  22226 |                  |                |        1 | B            |             |              |           | CHEMBL615119 |                |                |    15453 |                |                   |                                                                                                             |                   |                              |
|          4 | Bos taurus       | 104729 |                  |                |        1 | B            |             |              |           | CHEMBL615120 | 9913.0         |                |    17841 |                |                   | Binding affinity against A2 adenosine receptor in bovine striatal membranes using [3H]CGS-21680             |                   |                              |
|          5 | Homo sapiens     |  80001 |                  |                |        1 | F            |             |              | 163.0     | CHEMBL615121 | 9606.0         |                |    17430 |                | 143B              | In vitro cell cytotoxicity against 143-B cell lines (Human osteosarcoma cell line)                          |                   |                              |
|          6 | Homo sapiens     |  80001 |                  |                |        1 | F            |             |              | 163.0     | CHEMBL615122 | 9606.0         |                |    17430 |                | 143B              | In vitro cell cytotoxicity against 143-B cell lines (Human osteosarcoma cell line)                          |                   |                              |
|          7 | Mus musculus     |  80001 |                  |                |        1 | F            |             |              | 163.0     | CHEMBL615123 | 10090.0        |                |    13799 |                | 143B              | Cytotoxic Activity was evaluated against 143B (TK-) tumor cells                                             |                   |                              |
|          8 | Homo sapiens     |  80001 |                  |                |        1 | F            |             |              | 163.0     | CHEMBL615124 | 9606.0         |                |    17774 |                | 143B              | In vitro cell cytotoxicity was determined against 143B cell line                                            |                   |                              |
|          9 | Homo sapiens     |  80001 |                  |                |        1 | F            |             |              | 163.0     | CHEMBL615125 | 9606.0         |                |     3801 |                | 143B              | Inhibitory activity against tumor osteosarcoma cell line 143B after 72 hr continuous exposure to compound   |                   |                              |
|         10 | Homo sapiens     |  80001 |                  |                |        1 | F            |             |              | 163.0     | CHEMBL615126 | 9606.0         |                |    17430 |                | 143B              | In vitro cell cytotoxicity against 143B-LTK cell lines expressed in HSV-1 TK                                |                   |                              |

TableB:
|   ASI | ASOR              |    Ti | ASSCAT   | ASSTI   |   SI | ASSTY   | TII    | VARI   | CI   | CHI          |   ASTI | SASSI   |   DOI | ASST   | ASSCTY   | RELATTY   |   CONFISCO | CURAB        | BAFOR       |
|------:|:------------------|------:|:---------|:--------|-----:|:--------|:-------|:-------|:-----|:-------------|-------:|:--------|------:|:-------|:---------|:----------|-----------:|:-------------|:------------|
|  7524 | Rattus norvegicus | 50597 |          | Kidney  |    1 | A       | 2113.0 |        |      | CHEMBL618647 |  10116 |         |  9866 |        |          | N         |          1 | Intermediate | BAO_0000218 |
|  7525 | Rattus norvegicus | 50597 |          | Kidney  |    1 | A       | 2113.0 |        |      | CHEMBL618648 |  10116 |         |  9866 |        |          | N         |          1 | Intermediate | BAO_0000218 |
|  7526 | Rattus norvegicus | 50597 |          | Kidney  |    1 | A       | 2113.0 |        |      | CHEMBL618649 |  10116 |         |  9866 |        |          | N         |          1 | Intermediate | BAO_0000218 |
|  7527 | Rattus norvegicus | 50597 |          | Liver   |    1 | A       | 2107.0 |        |      | CHEMBL618650 |  10116 |         |  9866 |        |          | N         |          1 | Intermediate | BAO_0000218 |
|  7528 | Rattus norvegicus | 50597 |          | Liver   |    1 | A       | 2107.0 |        |      | CHEMBL618651 |  10116 |         |  9866 |        |          | N         |          1 | Intermediate | BAO_0000218 |
|  7529 | Rattus norvegicus | 50597 |          | Liver   |    1 | A       | 2107.0 |        |      | CHEMBL876497 |  10116 |         |  9866 |        |          | N         |          1 | Intermediate | BAO_0000218 |
|  7530 | Rattus norvegicus | 50597 |          | Lung    |    1 | A       | 2048.0 |        |      | CHEMBL618652 |  10116 |         |  9866 |        |          | N         |          1 | Intermediate | BAO_0000218 |
|  7531 | Rattus norvegicus | 50597 |          | Lung    |    1 | A       | 2048.0 |        |      | CHEMBL618653 |  10116 |         |  9866 |        |          | N         |          1 | Intermediate | BAO_0000218 |
|  7532 | Rattus norvegicus | 50597 |          | Lung    |    1 | A       | 2048.0 |        |      | CHEMBL618654 |  10116 |         |  9866 |        |          | N         |          1 | Intermediate | BAO_0000218 |
|  7533 | Rattus norvegicus | 50597 |          |         |    1 | A       |        |        |      | CHEMBL618655 |  10116 |         |  6351 |        |          | N         |          1 | Intermediate | BAO_0000218 |



source_headers: assay_id
assay_organism
tid
assay_category
assay_tissue
src_id
assay_type
tissue_id
variant_id
cell_id
chembl_id
assay_tax_id
src_assay_id
doc_id
assay_strain
assay_cell_type
target_headers: ASI
ASOR
Ti
ASSCAT
ASSTI
SI
ASSTY
TII
VARI
CI
CHI
ASTI
SASSI
DOI
ASST
ASSCTY
column_mappings: assay_id
ASI
assay_organism
ASOR
tid
Ti
assay_category
ASSCAT
assay_tissue
ASSTI
src_id
SI
assay_type
ASSTY
tissue_id
TII
variant_id
VARI
cell_id
CI
chembl_id
CHI
assay_tax_id
ASTI
src_assay_id
SASSI
doc_id
DOI
assay_strain
ASST
assay_cell_type
ASSCTY
output: {"column_mappings": [["assay_id", "ASI"], ["assay_organism", "ASOR"], ["tid", "Ti"], ["assay_category", "ASSCAT"], ["assay_tissue", "ASSTI"], ["src_id", "SI"], ["assay_type", "ASSTY"], ["tissue_id", "TII"], ["variant_id", "VARI"], ["cell_id", "CI"], ["chembl_id", "CHI"], ["assay_tax_id", "ASTI"], ["src_assay_id", "SASSI"], ["doc_id", "DOI"], ["assay_strain", "ASST"], ["assay_cell_type", "ASSCTY"], ["description", null], ["assay_test_type", null], ["assay_subcellular_fraction", null]]}