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

TableB:
|   assays_assay_id | assays_assay_organism   |   assays_tid | assays_tissue_id   | assays_assay_category   |   assays_src_id | assays_assay_test_type   | assays_src_assay_id   | assays_curated_by   |   assays_doc_id | assays_description                                                                                       | assays_assay_subcellular_fraction   | assays_relationship_type   | assays_assay_cell_type   | assays_assay_type   | assays_assay_strain   | assays_chembl_id   | assays_cell_id   | assays_bao_format   | assays_variant_id   |
|------------------:|:------------------------|-------------:|:-------------------|:------------------------|----------------:|:-------------------------|:----------------------|:--------------------|----------------:|:---------------------------------------------------------------------------------------------------------|:------------------------------------|:---------------------------|:-------------------------|:--------------------|:----------------------|:-------------------|:-----------------|:--------------------|:--------------------|
|              7524 | Rattus norvegicus       |        50597 | 2113.0             |                         |               1 | In vivo                  |                       | Intermediate        |            9866 | Biodistribution in normal rat kidney in the presence of 0.005 M Gd/0.01 M lig at 2 hr                    |                                     | N                          |                          | A                   |                       | CHEMBL618647       |                  | BAO_0000218         |                     |
|              7525 | Rattus norvegicus       |        50597 | 2113.0             |                         |               1 | In vivo                  |                       | Intermediate        |            9866 | Biodistribution in normal rat kidney in the presence of 0.01 M Gd/0.05 M lig                             |                                     | N                          |                          | A                   |                       | CHEMBL618648       |                  | BAO_0000218         |                     |
|              7526 | Rattus norvegicus       |        50597 | 2113.0             |                         |               1 | In vivo                  |                       | Intermediate        |            9866 | Biodistribution in normal rat kidney in the presence of NAC Gd 0.01 M lig at 2 hr                        |                                     | N                          |                          | A                   |                       | CHEMBL618649       |                  | BAO_0000218         |                     |
|              7527 | Rattus norvegicus       |        50597 | 2107.0             |                         |               1 | In vivo                  |                       | Intermediate        |            9866 | Biodistribution in normal rat liver in the presence of 0.005 M Gd/0.01 M lig at 2 hr                     |                                     | N                          |                          | A                   |                       | CHEMBL618650       |                  | BAO_0000218         |                     |
|              7528 | Rattus norvegicus       |        50597 | 2107.0             |                         |               1 | In vivo                  |                       | Intermediate        |            9866 | Biodistribution in normal rat liver in the presence of 0.01 M Gd/0.05 M lig                              |                                     | N                          |                          | A                   |                       | CHEMBL618651       |                  | BAO_0000218         |                     |
|              7529 | Rattus norvegicus       |        50597 | 2107.0             |                         |               1 | In vivo                  |                       | Intermediate        |            9866 | Biodistribution in normal rat liver in the presence of NAC Gd 0.01 M lig at 2 hr                         |                                     | N                          |                          | A                   |                       | CHEMBL876497       |                  | BAO_0000218         |                     |
|              7530 | Rattus norvegicus       |        50597 | 2048.0             |                         |               1 | In vivo                  |                       | Intermediate        |            9866 | Biodistribution in normal rat lung in the presence of 0.005 M Gd/0.01 M lig at 2 hr                      |                                     | N                          |                          | A                   |                       | CHEMBL618652       |                  | BAO_0000218         |                     |
|              7531 | Rattus norvegicus       |        50597 | 2048.0             |                         |               1 | In vivo                  |                       | Intermediate        |            9866 | Biodistribution in normal rat lung in the presence of 0.01 M Gd/0.05 M lig                               |                                     | N                          |                          | A                   |                       | CHEMBL618653       |                  | BAO_0000218         |                     |
|              7532 | Rattus norvegicus       |        50597 | 2048.0             |                         |               1 | In vivo                  |                       | Intermediate        |            9866 | Biodistribution in normal rat lung in the presence of NAC Gd 0.01 M lig at 2 hr                          |                                     | N                          |                          | A                   |                       | CHEMBL618654       |                  | BAO_0000218         |                     |
|              7533 | Rattus norvegicus       |        50597 |                    |                         |               1 |                          |                       | Intermediate        |            6351 | Recovery rate from urine and bile was determined after iv administration at 20 mg/kg in rats; Not tested |                                     | N                          |                          | A                   |                       | CHEMBL618655       |                  | BAO_0000218         |                     |



source_headers: assay_id
assay_organism
tid
tissue_id
assay_category
src_id
assay_test_type
src_assay_id
curated_by
doc_id
description
assay_subcellular_fraction
relationship_type
assay_cell_type
assay_type
assay_strain
target_headers: assays_assay_id
assays_assay_organism
assays_tid
assays_tissue_id
assays_assay_category
assays_src_id
assays_assay_test_type
assays_src_assay_id
assays_curated_by
assays_doc_id
assays_description
assays_assay_subcellular_fraction
assays_relationship_type
assays_assay_cell_type
assays_assay_type
assays_assay_strain
column_mappings: assay_id
assays_assay_id
assay_organism
assays_assay_organism
tid
assays_tid
tissue_id
assays_tissue_id
assay_category
assays_assay_category
src_id
assays_src_id
assay_test_type
assays_assay_test_type
src_assay_id
assays_src_assay_id
curated_by
assays_curated_by
doc_id
assays_doc_id
description
assays_description
assay_subcellular_fraction
assays_assay_subcellular_fraction
relationship_type
assays_relationship_type
assay_cell_type
assays_assay_cell_type
assay_type
assays_assay_type
assay_strain
assays_assay_strain
output: {"column_mappings": [["assay_id", "assays_assay_id"], ["assay_organism", "assays_assay_organism"], ["tid", "assays_tid"], ["tissue_id", "assays_tissue_id"], ["assay_category", "assays_assay_category"], ["src_id", "assays_src_id"], ["assay_test_type", "assays_assay_test_type"], ["src_assay_id", "assays_src_assay_id"], ["curated_by", "assays_curated_by"], ["doc_id", "assays_doc_id"], ["description", "assays_description"], ["assay_subcellular_fraction", "assays_assay_subcellular_fraction"], ["relationship_type", "assays_relationship_type"], ["assay_cell_type", "assays_assay_cell_type"], ["assay_type", "assays_assay_type"], ["assay_strain", "assays_assay_strain"], ["assay_tax_id", null], ["assay_tissue", null], ["confidence_score", null]]}