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_subcellular_fraction   | assay_tissue   |    tid |   confidence_score | curated_by   | assay_organism   | tissue_id   | relationship_type   | assay_type   | assay_tax_id   | assay_cell_type   | variant_id   | src_assay_id   | cell_id   | chembl_id    |   doc_id | description                                                                                                 | assay_test_type   |
|-----------:|:-----------------------------|:---------------|-------:|-------------------:|:-------------|:-----------------|:------------|:--------------------|:-------------|:---------------|:------------------|:-------------|:---------------|:----------|:-------------|---------:|:------------------------------------------------------------------------------------------------------------|:------------------|
|          1 |                              |                |  12052 |                  8 | Autpcuratuon |                  |             | H                   | B            |                |                   |              |                |           | CHEnBp615117 |    11087 | The compound was tested for the in vitro inhibition of platelet 12-lipoxygenase at a concentration of 30 uM |                   |
|          2 |                              |                |  22226 |                  0 | Autocyrqtion |                  |             | U                   | F            |                |                   |              |                |           | CHEMBL6w5218 |      684 | Compound was evaluated for its ability to mobilize calcium in 1321NI cells                                  |                   |
|          3 |                              |                |  22226 |                  0 | Aytocurati8n |                  |             | U                   | B            |                |                   |              |                |           | CHEkBL615110 |    15453 |                                                                                                             |                   |
|          4 |                              |                | 104729 |                  4 | Aut9curatioh | Bos4aurus        |             | H                   | B            | 8938.0         |                   |              |                |           | dHEMBL615w20 |    17841 | Binding affinity against A2 adenosine receptor in bovine striatal membranes using [3H]CGS-21680             |                   |
|          5 |                              |                |  80001 |                  1 | Intermediq5e | Homoszpienw      |             | N                   | F            | 34530.0        | 143B              |              |                | 284.0     | CHEMhL615122 |    17430 | In vitro cell cytotoxicity against 143-B cell lines (Human osteosarcoma cell line)                          |                   |
|          6 |                              |                |  80001 |                  1 | Intrrmefiate | Homosaliems      |             | N                   | F            | 9245.0         | 143B              |              |                | 611.0     | CHskBL615122 |    17430 | In vitro cell cytotoxicity against 143-B cell lines (Human osteosarcoma cell line)                          |                   |
|          7 |                              |                |  80001 |                  1 | Infsrmediate | Mucnusculus      |             | N                   | F            | 5293.0         | 143B              |              |                | 644.0     | CHrMBL616123 |    13799 | Cytotoxic Activity was evaluated against 143B (TK-) tumor cells                                             |                   |
|          8 |                              |                |  80001 |                  1 | Espert       | Hpmosaliens      |             | N                   | F            | 12696.0        | 143B              |              |                | 375.0     | xHEMBLy15124 |    17774 | In vitro cell cytotoxicity was determined against 143B cell line                                            |                   |
|          9 |                              |                |  80001 |                  1 | lntermediqte | Homosapkenz      |             | N                   | F            | 1407.0         | 143B              |              |                | 383.0     | xHEMBL615225 |     3801 | Inhibitory activity against tumor osteosarcoma cell line 143B after 72 hr continuous exposure to compound   |                   |
|         10 |                              |                |  80001 |                  1 | jntermediwte | tomosapuens      |             | N                   | F            | 32593.0        | 143B              |              |                | 219.0     | CHEhBL615q26 |    17430 | In vitro cell cytotoxicity against 143B-LTK cell lines expressed in HSV-1 TK                                |                   |

TableB:
|   assay_id | assay_subcellular_fraction   | assay_tissue   |   tid |   confidence_score | curated_by   | assay_organism    | tissue_id   | relationship_type   | assay_type   |   assay_tax_id | assay_cell_type   | variant_id   | src_assay_id   | cell_id   | chembl_id    | assay_category   | assay_strain   |   src_id | bao_format   |
|-----------:|:-----------------------------|:---------------|------:|-------------------:|:-------------|:------------------|:------------|:--------------------|:-------------|---------------:|:------------------|:-------------|:---------------|:----------|:-------------|:-----------------|:---------------|---------:|:-------------|
|       7524 |                              | Kidney         | 50597 |                  1 | Intermediate | Rattus norvegicus | 2113.0      | N                   | A            |          10116 |                   |              |                |           | CHEMBL618647 |                  |                |        1 | BAO_0000218  |
|       7525 |                              | Kidney         | 50597 |                  1 | Intermediate | Rattus norvegicus | 2113.0      | N                   | A            |          10116 |                   |              |                |           | CHEMBL618648 |                  |                |        1 | BAO_0000218  |
|       7526 |                              | Kidney         | 50597 |                  1 | Intermediate | Rattus norvegicus | 2113.0      | N                   | A            |          10116 |                   |              |                |           | CHEMBL618649 |                  |                |        1 | BAO_0000218  |
|       7527 |                              | Liver          | 50597 |                  1 | Intermediate | Rattus norvegicus | 2107.0      | N                   | A            |          10116 |                   |              |                |           | CHEMBL618650 |                  |                |        1 | BAO_0000218  |
|       7528 |                              | Liver          | 50597 |                  1 | Intermediate | Rattus norvegicus | 2107.0      | N                   | A            |          10116 |                   |              |                |           | CHEMBL618651 |                  |                |        1 | BAO_0000218  |
|       7529 |                              | Liver          | 50597 |                  1 | Intermediate | Rattus norvegicus | 2107.0      | N                   | A            |          10116 |                   |              |                |           | CHEMBL876497 |                  |                |        1 | BAO_0000218  |
|       7530 |                              | Lung           | 50597 |                  1 | Intermediate | Rattus norvegicus | 2048.0      | N                   | A            |          10116 |                   |              |                |           | CHEMBL618652 |                  |                |        1 | BAO_0000218  |
|       7531 |                              | Lung           | 50597 |                  1 | Intermediate | Rattus norvegicus | 2048.0      | N                   | A            |          10116 |                   |              |                |           | CHEMBL618653 |                  |                |        1 | BAO_0000218  |
|       7532 |                              | Lung           | 50597 |                  1 | Intermediate | Rattus norvegicus | 2048.0      | N                   | A            |          10116 |                   |              |                |           | CHEMBL618654 |                  |                |        1 | BAO_0000218  |
|       7533 |                              |                | 50597 |                  1 | Intermediate | Rattus norvegicus |             | N                   | A            |          10116 |                   |              |                |           | CHEMBL618655 |                  |                |        1 | BAO_0000218  |



source_headers: assay_id
assay_subcellular_fraction
assay_tissue
tid
confidence_score
curated_by
assay_organism
tissue_id
relationship_type
assay_type
assay_tax_id
assay_cell_type
variant_id
src_assay_id
cell_id
chembl_id
target_headers: assay_id
assay_subcellular_fraction
assay_tissue
tid
confidence_score
curated_by
assay_organism
tissue_id
relationship_type
assay_type
assay_tax_id
assay_cell_type
variant_id
src_assay_id
cell_id
chembl_id
column_mappings: assay_id
assay_id
assay_subcellular_fraction
assay_subcellular_fraction
assay_tissue
assay_tissue
tid
tid
confidence_score
confidence_score
curated_by
curated_by
assay_organism
assay_organism
tissue_id
tissue_id
relationship_type
relationship_type
assay_type
assay_type
assay_tax_id
assay_tax_id
assay_cell_type
assay_cell_type
variant_id
variant_id
src_assay_id
src_assay_id
cell_id
cell_id
chembl_id
chembl_id
output: {"column_mappings": [["assay_id", "assay_id"], ["assay_subcellular_fraction", "assay_subcellular_fraction"], ["assay_tissue", "assay_tissue"], ["tid", "tid"], ["confidence_score", "confidence_score"], ["curated_by", "curated_by"], ["assay_organism", "assay_organism"], ["tissue_id", "tissue_id"], ["relationship_type", "relationship_type"], ["assay_type", "assay_type"], ["assay_tax_id", "assay_tax_id"], ["assay_cell_type", "assay_cell_type"], ["variant_id", "variant_id"], ["src_assay_id", "src_assay_id"], ["cell_id", "cell_id"], ["chembl_id", "chembl_id"], ["doc_id", null], ["description", null], ["assay_test_type", null]]}