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 | chembl_id    | assay_organism   | assay_tissue   | assay_type   | curated_by   |   doc_id | description                                                                                                 | assay_test_type   | assay_category   | assay_tax_id   | assay_strain   | assay_cell_type   | assay_subcellular_fraction   |
|-----------:|:-------------|:-----------------|:---------------|:-------------|:-------------|---------:|:------------------------------------------------------------------------------------------------------------|:------------------|:-----------------|:---------------|:---------------|:------------------|:-----------------------------|
|          1 | CH4MBL615127 |                  |                | B            | Autpcyration |    11087 | The compound was tested for the in vitro inhibition of platelet 12-lipoxygenase at a concentration of 30 uM |                   |                  |                |                |                   |                              |
|          2 | CyEMBLy15118 |                  |                | F            | Augocurati9n |      684 | Compound was evaluated for its ability to mobilize calcium in 1321NI cells                                  |                   |                  |                |                |                   |                              |
|          3 | CHEMBL615218 |                  |                | B            | Aut0curatiom |    15453 |                                                                                                             |                   |                  |                |                |                   |                              |
|          4 | CHEMBo615q20 | gostaurus        |                | B            | Autockfation |    17841 | Binding affinity against A2 adenosine receptor in bovine striatal membranes using [3H]CGS-21680             |                   |                  | 9913.0         |                |                   |                              |
|          5 | xHEMBL61512q | nomosapiena      |                | F            | In6ermeeiate |    17430 | In vitro cell cytotoxicity against 143-B cell lines (Human osteosarcoma cell line)                          |                   |                  | 9606.0         |                | 143B              |                              |
|          6 | CHEMBi614122 | gomosap9ens      |                | F            | Intermeciatw |    17430 | In vitro cell cytotoxicity against 143-B cell lines (Human osteosarcoma cell line)                          |                   |                  | 9606.0         |                | 143B              |                              |
|          7 | vHEMBk615123 | Mucmussulus      |                | F            | Infedmediate |    13799 | Cytotoxic Activity was evaluated against 143B (TK-) tumor cells                                             |                   |                  | 10090.0        |                | 143B              |                              |
|          8 | CHEMBky15124 | Homodap9ens      |                | F            | Espert       |    17774 | In vitro cell cytotoxicity was determined against 143B cell line                                            |                   |                  | 9606.0         |                | 143B              |                              |
|          9 | vHEMBLu15125 | gomoswpiens      |                | F            | Intrrmediatf |     3801 | Inhibitory activity against tumor osteosarcoma cell line 143B after 72 hr continuous exposure to compound   |                   |                  | 9606.0         |                | 143B              |                              |
|         10 | CHEMgk615126 | Hojosa9iens      |                | F            | Int2rmeriate |    17430 | In vitro cell cytotoxicity against 143B-LTK cell lines expressed in HSV-1 TK                                |                   |                  | 9606.0         |                | 143B              |                              |

TableB:
|   assays_ASI | assays_CHEI   | assays_ASORGA     | assays_ASSTIS   | assays_ASSTY   | assays_CURB   |   assays_T | assays_RELATY   |   assays_CONFSCO |   assays_SI | assays_SASI   | assays_CI   | assays_BFO   | assays_TII   | assays_VAI   |
|-------------:|:--------------|:------------------|:----------------|:---------------|:--------------|-----------:|:----------------|-----------------:|------------:|:--------------|:------------|:-------------|:-------------|:-------------|
|         7524 | CHEMBL618647  | Rattus norvegicus | Kidney          | A              | Intermediate  |      50597 | N               |                1 |           1 |               |             | BAO_0000218  | 2113.0       |              |
|         7525 | CHEMBL618648  | Rattus norvegicus | Kidney          | A              | Intermediate  |      50597 | N               |                1 |           1 |               |             | BAO_0000218  | 2113.0       |              |
|         7526 | CHEMBL618649  | Rattus norvegicus | Kidney          | A              | Intermediate  |      50597 | N               |                1 |           1 |               |             | BAO_0000218  | 2113.0       |              |
|         7527 | CHEMBL618650  | Rattus norvegicus | Liver           | A              | Intermediate  |      50597 | N               |                1 |           1 |               |             | BAO_0000218  | 2107.0       |              |
|         7528 | CHEMBL618651  | Rattus norvegicus | Liver           | A              | Intermediate  |      50597 | N               |                1 |           1 |               |             | BAO_0000218  | 2107.0       |              |
|         7529 | CHEMBL876497  | Rattus norvegicus | Liver           | A              | Intermediate  |      50597 | N               |                1 |           1 |               |             | BAO_0000218  | 2107.0       |              |
|         7530 | CHEMBL618652  | Rattus norvegicus | Lung            | A              | Intermediate  |      50597 | N               |                1 |           1 |               |             | BAO_0000218  | 2048.0       |              |
|         7531 | CHEMBL618653  | Rattus norvegicus | Lung            | A              | Intermediate  |      50597 | N               |                1 |           1 |               |             | BAO_0000218  | 2048.0       |              |
|         7532 | CHEMBL618654  | Rattus norvegicus | Lung            | A              | Intermediate  |      50597 | N               |                1 |           1 |               |             | BAO_0000218  | 2048.0       |              |
|         7533 | CHEMBL618655  | Rattus norvegicus |                 | A              | Intermediate  |      50597 | N               |                1 |           1 |               |             | BAO_0000218  |              |              |



source_headers: assay_id
chembl_id
assay_organism
assay_tissue
assay_type
curated_by
target_headers: assays_ASI
assays_CHEI
assays_ASORGA
assays_ASSTIS
assays_ASSTY
assays_CURB
column_mappings: assay_id
assays_ASI
chembl_id
assays_CHEI
assay_organism
assays_ASORGA
assay_tissue
assays_ASSTIS
assay_type
assays_ASSTY
curated_by
assays_CURB
output: {"column_mappings": [["assay_id", "assays_ASI"], ["chembl_id", "assays_CHEI"], ["assay_organism", "assays_ASORGA"], ["assay_tissue", "assays_ASSTIS"], ["assay_type", "assays_ASSTY"], ["curated_by", "assays_CURB"], ["doc_id", null], ["description", null], ["assay_test_type", null], ["assay_category", null], ["assay_tax_id", null], ["assay_strain", null], ["assay_cell_type", null], ["assay_subcellular_fraction", null]]}