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 |   doc_id | description                                                                                                 | assay_type   | assay_test_type   | assay_category   | assay_organism   | assay_tax_id   | assay_strain   | assay_tissue   | assay_cell_type   | assay_subcellular_fraction   |    tid | relationship_type   |   confidence_score | curated_by   |   src_id | src_assay_id   | chembl_id    | cell_id   | bao_format   | tissue_id   | variant_id   |
|-----------:|---------:|:------------------------------------------------------------------------------------------------------------|:-------------|:------------------|:-----------------|:-----------------|:---------------|:---------------|:---------------|:------------------|:-----------------------------|-------:|:--------------------|-------------------:|:-------------|---------:|:---------------|:-------------|:----------|:-------------|:------------|:-------------|
|          1 |    11087 | The compound was tested for the in vitro inhibition of platelet 12-lipoxygenase at a concentration of 30 uM | B            |                   |                  |                  |                |                |                |                   |                              |  12052 | H                   |                  8 | Autocuration |        1 |                | CHEMBL615117 |           | BAO_0000019  |             |              |
|          2 |      684 | Compound was evaluated for its ability to mobilize calcium in 1321NI cells                                  | F            |                   |                  |                  |                |                |                |                   |                              |  22226 | U                   |                  0 | Autocuration |        1 |                | CHEMBL615118 |           | BAO_0000219  |             |              |
|          3 |    15453 |                                                                                                             | B            |                   |                  |                  |                |                |                |                   |                              |  22226 | U                   |                  0 | Autocuration |        1 |                | CHEMBL615119 |           | BAO_0000019  |             |              |
|          4 |    17841 | Binding affinity against A2 adenosine receptor in bovine striatal membranes using [3H]CGS-21680             | B            |                   |                  | Bos taurus       | 9913.0         |                |                |                   |                              | 104729 | H                   |                  4 | Autocuration |        1 |                | CHEMBL615120 |           | BAO_0000249  |             |              |
|          5 |    17430 | In vitro cell cytotoxicity against 143-B cell lines (Human osteosarcoma cell line)                          | F            |                   |                  | Homo sapiens     | 9606.0         |                |                | 143B              |                              |  80001 | N                   |                  1 | Intermediate |        1 |                | CHEMBL615121 | 163.0     | BAO_0000219  |             |              |
|          6 |    17430 | In vitro cell cytotoxicity against 143-B cell lines (Human osteosarcoma cell line)                          | F            |                   |                  | Homo sapiens     | 9606.0         |                |                | 143B              |                              |  80001 | N                   |                  1 | Intermediate |        1 |                | CHEMBL615122 | 163.0     | BAO_0000219  |             |              |
|          7 |    13799 | Cytotoxic Activity was evaluated against 143B (TK-) tumor cells                                             | F            |                   |                  | Mus musculus     | 10090.0        |                |                | 143B              |                              |  80001 | N                   |                  1 | Intermediate |        1 |                | CHEMBL615123 | 163.0     | BAO_0000219  |             |              |
|          8 |    17774 | In vitro cell cytotoxicity was determined against 143B cell line                                            | F            |                   |                  | Homo sapiens     | 9606.0         |                |                | 143B              |                              |  80001 | N                   |                  1 | Expert       |        1 |                | CHEMBL615124 | 163.0     | BAO_0000219  |             |              |
|          9 |     3801 | Inhibitory activity against tumor osteosarcoma cell line 143B after 72 hr continuous exposure to compound   | F            |                   |                  | Homo sapiens     | 9606.0         |                |                | 143B              |                              |  80001 | N                   |                  1 | Intermediate |        1 |                | CHEMBL615125 | 163.0     | BAO_0000219  |             |              |
|         10 |    17430 | In vitro cell cytotoxicity against 143B-LTK cell lines expressed in HSV-1 TK                                | F            |                   |                  | Homo sapiens     | 9606.0         |                |                | 143B              |                              |  80001 | N                   |                  1 | Intermediate |        1 |                | CHEMBL615126 | 163.0     | BAO_0000219  |             |              |

TableB:
|   ASI |   DOI | Descr                                                                                                    | ASTY   | ASTET   | ASSCATE   | ASOR              |   ASSTI | ASST   | ASSTIS   | ASSCETY   | ASSUBCELFRA   |    Ti | RELATITY   |   CONSC | CUB          |   SI | SASI   | CHI          | CEI   | BAFO        | TII    | VAI   |
|------:|------:|:---------------------------------------------------------------------------------------------------------|:-------|:--------|:----------|:------------------|--------:|:-------|:---------|:----------|:--------------|------:|:-----------|--------:|:-------------|-----:|:-------|:-------------|:------|:------------|:-------|:------|
|  7524 |  9866 | Biodistribution in normal rat kidney in the presence of 0.005 M Gd/0.01 M lig at 2 hr                    | A      | In vivo |           | Rattus norvegicus |   10116 |        | Kidney   |           |               | 50597 | N          |       1 | Intermediate |    1 |        | CHEMBL618647 |       | BAO_0000218 | 2113.0 |       |
|  7525 |  9866 | Biodistribution in normal rat kidney in the presence of 0.01 M Gd/0.05 M lig                             | A      | In vivo |           | Rattus norvegicus |   10116 |        | Kidney   |           |               | 50597 | N          |       1 | Intermediate |    1 |        | CHEMBL618648 |       | BAO_0000218 | 2113.0 |       |
|  7526 |  9866 | Biodistribution in normal rat kidney in the presence of NAC Gd 0.01 M lig at 2 hr                        | A      | In vivo |           | Rattus norvegicus |   10116 |        | Kidney   |           |               | 50597 | N          |       1 | Intermediate |    1 |        | CHEMBL618649 |       | BAO_0000218 | 2113.0 |       |
|  7527 |  9866 | Biodistribution in normal rat liver in the presence of 0.005 M Gd/0.01 M lig at 2 hr                     | A      | In vivo |           | Rattus norvegicus |   10116 |        | Liver    |           |               | 50597 | N          |       1 | Intermediate |    1 |        | CHEMBL618650 |       | BAO_0000218 | 2107.0 |       |
|  7528 |  9866 | Biodistribution in normal rat liver in the presence of 0.01 M Gd/0.05 M lig                              | A      | In vivo |           | Rattus norvegicus |   10116 |        | Liver    |           |               | 50597 | N          |       1 | Intermediate |    1 |        | CHEMBL618651 |       | BAO_0000218 | 2107.0 |       |
|  7529 |  9866 | Biodistribution in normal rat liver in the presence of NAC Gd 0.01 M lig at 2 hr                         | A      | In vivo |           | Rattus norvegicus |   10116 |        | Liver    |           |               | 50597 | N          |       1 | Intermediate |    1 |        | CHEMBL876497 |       | BAO_0000218 | 2107.0 |       |
|  7530 |  9866 | Biodistribution in normal rat lung in the presence of 0.005 M Gd/0.01 M lig at 2 hr                      | A      | In vivo |           | Rattus norvegicus |   10116 |        | Lung     |           |               | 50597 | N          |       1 | Intermediate |    1 |        | CHEMBL618652 |       | BAO_0000218 | 2048.0 |       |
|  7531 |  9866 | Biodistribution in normal rat lung in the presence of 0.01 M Gd/0.05 M lig                               | A      | In vivo |           | Rattus norvegicus |   10116 |        | Lung     |           |               | 50597 | N          |       1 | Intermediate |    1 |        | CHEMBL618653 |       | BAO_0000218 | 2048.0 |       |
|  7532 |  9866 | Biodistribution in normal rat lung in the presence of NAC Gd 0.01 M lig at 2 hr                          | A      | In vivo |           | Rattus norvegicus |   10116 |        | Lung     |           |               | 50597 | N          |       1 | Intermediate |    1 |        | CHEMBL618654 |       | BAO_0000218 | 2048.0 |       |
|  7533 |  6351 | Recovery rate from urine and bile was determined after iv administration at 20 mg/kg in rats; Not tested | A      |         |           | Rattus norvegicus |   10116 |        |          |           |               | 50597 | N          |       1 | Intermediate |    1 |        | CHEMBL618655 |       | BAO_0000218 |        |       |



source_headers: assay_id
doc_id
description
assay_type
assay_test_type
assay_category
assay_organism
assay_tax_id
assay_strain
assay_tissue
assay_cell_type
assay_subcellular_fraction
tid
relationship_type
confidence_score
curated_by
src_id
src_assay_id
chembl_id
cell_id
bao_format
tissue_id
variant_id
target_headers: ASI
DOI
Descr
ASTY
ASTET
ASSCATE
ASOR
ASSTI
ASST
ASSTIS
ASSCETY
ASSUBCELFRA
Ti
RELATITY
CONSC
CUB
SI
SASI
CHI
CEI
BAFO
TII
VAI
column_mappings: assay_id
ASI
doc_id
DOI
description
Descr
assay_type
ASTY
assay_test_type
ASTET
assay_category
ASSCATE
assay_organism
ASOR
assay_tax_id
ASSTI
assay_strain
ASST
assay_tissue
ASSTIS
assay_cell_type
ASSCETY
assay_subcellular_fraction
ASSUBCELFRA
tid
Ti
relationship_type
RELATITY
confidence_score
CONSC
curated_by
CUB
src_id
SI
src_assay_id
SASI
chembl_id
CHI
cell_id
CEI
bao_format
BAFO
tissue_id
TII
variant_id
VAI
output: {"column_mappings": [["assay_id", "ASI"], ["doc_id", "DOI"], ["description", "Descr"], ["assay_type", "ASTY"], ["assay_test_type", "ASTET"], ["assay_category", "ASSCATE"], ["assay_organism", "ASOR"], ["assay_tax_id", "ASSTI"], ["assay_strain", "ASST"], ["assay_tissue", "ASSTIS"], ["assay_cell_type", "ASSCETY"], ["assay_subcellular_fraction", "ASSUBCELFRA"], ["tid", "Ti"], ["relationship_type", "RELATITY"], ["confidence_score", "CONSC"], ["curated_by", "CUB"], ["src_id", "SI"], ["src_assay_id", "SASI"], ["chembl_id", "CHI"], ["cell_id", "CEI"], ["bao_format", "BAFO"], ["tissue_id", "TII"], ["variant_id", "VAI"]]}