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:
|   assays_ASI |   assays_DOI | assays_Descr                                                                                             | assays_AST   | assays_ASTTY   | assays_ASSCA   | assays_ASOR       |   assays_ASTI | assays_ASST   | assays_ASSTI   | assays_ASCETY   | assays_ASSUBCFRAC   |   assays_Ti | assays_RELT   |   assays_CONSC | assays_CUB   |   assays_SI | assays_SASI   | assays_CHEI   | assays_CI   | assays_BFO   | assays_TISI   | assays_VARII   |
|-------------:|-------------:|:---------------------------------------------------------------------------------------------------------|:-------------|:---------------|:---------------|:------------------|--------------:|:--------------|:---------------|:----------------|:--------------------|------------:|:--------------|---------------:|:-------------|------------:|:--------------|:--------------|:------------|:-------------|:--------------|:---------------|
|         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: assays_ASI
assays_DOI
assays_Descr
assays_AST
assays_ASTTY
assays_ASSCA
assays_ASOR
assays_ASTI
assays_ASST
assays_ASSTI
assays_ASCETY
assays_ASSUBCFRAC
assays_Ti
assays_RELT
assays_CONSC
assays_CUB
assays_SI
assays_SASI
assays_CHEI
assays_CI
assays_BFO
assays_TISI
assays_VARII
column_mappings: assay_id
assays_ASI
doc_id
assays_DOI
description
assays_Descr
assay_type
assays_AST
assay_test_type
assays_ASTTY
assay_category
assays_ASSCA
assay_organism
assays_ASOR
assay_tax_id
assays_ASTI
assay_strain
assays_ASST
assay_tissue
assays_ASSTI
assay_cell_type
assays_ASCETY
assay_subcellular_fraction
assays_ASSUBCFRAC
tid
assays_Ti
relationship_type
assays_RELT
confidence_score
assays_CONSC
curated_by
assays_CUB
src_id
assays_SI
src_assay_id
assays_SASI
chembl_id
assays_CHEI
cell_id
assays_CI
bao_format
assays_BFO
tissue_id
assays_TISI
variant_id
assays_VARII
output: {"column_mappings": [["assay_id", "assays_ASI"], ["doc_id", "assays_DOI"], ["description", "assays_Descr"], ["assay_type", "assays_AST"], ["assay_test_type", "assays_ASTTY"], ["assay_category", "assays_ASSCA"], ["assay_organism", "assays_ASOR"], ["assay_tax_id", "assays_ASTI"], ["assay_strain", "assays_ASST"], ["assay_tissue", "assays_ASSTI"], ["assay_cell_type", "assays_ASCETY"], ["assay_subcellular_fraction", "assays_ASSUBCFRAC"], ["tid", "assays_Ti"], ["relationship_type", "assays_RELT"], ["confidence_score", "assays_CONSC"], ["curated_by", "assays_CUB"], ["src_id", "assays_SI"], ["src_assay_id", "assays_SASI"], ["chembl_id", "assays_CHEI"], ["cell_id", "assays_CI"], ["bao_format", "assays_BFO"], ["tissue_id", "assays_TISI"], ["variant_id", "assays_VARII"]]}