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

TableB:
|   ASI | ASSTY   | ASTTY   |   ASSTI | ASSTR   |    Ti | CURB         | Des                                                                                                      | SRASSI   | CHEI         | ASCATE   |   CONSC |   SI | CI   | BFOR        | TII    | VARII   |
|------:|:--------|:--------|--------:|:--------|------:|:-------------|:---------------------------------------------------------------------------------------------------------|:---------|:-------------|:---------|--------:|-----:|:-----|:------------|:-------|:--------|
|  7524 | A       | In vivo |   10116 |         | 50597 | Intermediate | Biodistribution in normal rat kidney in the presence of 0.005 M Gd/0.01 M lig at 2 hr                    |          | CHEMBL618647 |          |       1 |    1 |      | BAO_0000218 | 2113.0 |         |
|  7525 | A       | In vivo |   10116 |         | 50597 | Intermediate | Biodistribution in normal rat kidney in the presence of 0.01 M Gd/0.05 M lig                             |          | CHEMBL618648 |          |       1 |    1 |      | BAO_0000218 | 2113.0 |         |
|  7526 | A       | In vivo |   10116 |         | 50597 | Intermediate | Biodistribution in normal rat kidney in the presence of NAC Gd 0.01 M lig at 2 hr                        |          | CHEMBL618649 |          |       1 |    1 |      | BAO_0000218 | 2113.0 |         |
|  7527 | A       | In vivo |   10116 |         | 50597 | Intermediate | Biodistribution in normal rat liver in the presence of 0.005 M Gd/0.01 M lig at 2 hr                     |          | CHEMBL618650 |          |       1 |    1 |      | BAO_0000218 | 2107.0 |         |
|  7528 | A       | In vivo |   10116 |         | 50597 | Intermediate | Biodistribution in normal rat liver in the presence of 0.01 M Gd/0.05 M lig                              |          | CHEMBL618651 |          |       1 |    1 |      | BAO_0000218 | 2107.0 |         |
|  7529 | A       | In vivo |   10116 |         | 50597 | Intermediate | Biodistribution in normal rat liver in the presence of NAC Gd 0.01 M lig at 2 hr                         |          | CHEMBL876497 |          |       1 |    1 |      | BAO_0000218 | 2107.0 |         |
|  7530 | A       | In vivo |   10116 |         | 50597 | Intermediate | Biodistribution in normal rat lung in the presence of 0.005 M Gd/0.01 M lig at 2 hr                      |          | CHEMBL618652 |          |       1 |    1 |      | BAO_0000218 | 2048.0 |         |
|  7531 | A       | In vivo |   10116 |         | 50597 | Intermediate | Biodistribution in normal rat lung in the presence of 0.01 M Gd/0.05 M lig                               |          | CHEMBL618653 |          |       1 |    1 |      | BAO_0000218 | 2048.0 |         |
|  7532 | A       | In vivo |   10116 |         | 50597 | Intermediate | Biodistribution in normal rat lung in the presence of NAC Gd 0.01 M lig at 2 hr                          |          | CHEMBL618654 |          |       1 |    1 |      | BAO_0000218 | 2048.0 |         |
|  7533 | A       |         |   10116 |         | 50597 | Intermediate | Recovery rate from urine and bile was determined after iv administration at 20 mg/kg in rats; Not tested |          | CHEMBL618655 |          |       1 |    1 |      | BAO_0000218 |        |         |



source_headers: assay_id
assay_type
assay_test_type
assay_tax_id
assay_strain
tid
curated_by
description
src_assay_id
chembl_id
assay_category
target_headers: ASI
ASSTY
ASTTY
ASSTI
ASSTR
Ti
CURB
Des
SRASSI
CHEI
ASCATE
column_mappings: assay_id
ASI
assay_type
ASSTY
assay_test_type
ASTTY
assay_tax_id
ASSTI
assay_strain
ASSTR
tid
Ti
curated_by
CURB
description
Des
src_assay_id
SRASSI
chembl_id
CHEI
assay_category
ASCATE
output: {"column_mappings": [["assay_id", "ASI"], ["assay_type", "ASSTY"], ["assay_test_type", "ASTTY"], ["assay_tax_id", "ASSTI"], ["assay_strain", "ASSTR"], ["tid", "Ti"], ["curated_by", "CURB"], ["description", "Des"], ["src_assay_id", "SRASSI"], ["chembl_id", "CHEI"], ["assay_category", "ASCATE"], ["doc_id", null], ["assay_organism", null], ["assay_tissue", null], ["assay_cell_type", null], ["assay_subcellular_fraction", null], ["relationship_type", null]]}