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 | src_assay_id   | assay_tax_id   | assay_tissue   | variant_id   | assay_subcellular_fraction   |   confidence_score | assay_type   | relationship_type   | curated_by   |   doc_id | description                                                                                                 | assay_test_type   | assay_category   | assay_organism   | assay_strain   | assay_cell_type   |
|-----------:|:---------------|:---------------|:---------------|:-------------|:-----------------------------|-------------------:|:-------------|:--------------------|:-------------|---------:|:------------------------------------------------------------------------------------------------------------|:------------------|:-----------------|:-----------------|:---------------|:------------------|
|          1 |                |                |                |              |                              |                  8 | B            | H                   | sutocyration |    11087 | The compound was tested for the in vitro inhibition of platelet 12-lipoxygenase at a concentration of 30 uM |                   |                  |                  |                |                   |
|          2 |                |                |                |              |                              |                  0 | F            | U                   | A7tocurstion |      684 | Compound was evaluated for its ability to mobilize calcium in 1321NI cells                                  |                   |                  |                  |                |                   |
|          3 |                |                |                |              |                              |                  0 | B            | U                   | Au5ovuration |    15453 |                                                                                                             |                   |                  |                  |                |                   |
|          4 |                | 54391.0        |                |              |                              |                  4 | B            | H                   | xutofuration |    17841 | Binding affinity against A2 adenosine receptor in bovine striatal membranes using [3H]CGS-21680             |                   |                  | Bos taurus       |                |                   |
|          5 |                | 33350.0        |                |              |                              |                  1 | F            | N                   | Intermesjate |    17430 | In vitro cell cytotoxicity against 143-B cell lines (Human osteosarcoma cell line)                          |                   |                  | Homo sapiens     |                | 143B              |
|          6 |                | 16845.0        |                |              |                              |                  1 | F            | N                   | untermewiate |    17430 | In vitro cell cytotoxicity against 143-B cell lines (Human osteosarcoma cell line)                          |                   |                  | Homo sapiens     |                | 143B              |
|          7 |                | 45930.0        |                |              |                              |                  1 | F            | N                   | Intermed7ats |    13799 | Cytotoxic Activity was evaluated against 143B (TK-) tumor cells                                             |                   |                  | Mus musculus     |                | 143B              |
|          8 |                | 10479.0        |                |              |                              |                  1 | F            | N                   | Ex0ert       |    17774 | In vitro cell cytotoxicity was determined against 143B cell line                                            |                   |                  | Homo sapiens     |                | 143B              |
|          9 |                | 22955.0        |                |              |                              |                  1 | F            | N                   | In4edmediate |     3801 | Inhibitory activity against tumor osteosarcoma cell line 143B after 72 hr continuous exposure to compound   |                   |                  | Homo sapiens     |                | 143B              |
|         10 |                | 11410.0        |                |              |                              |                  1 | F            | N                   | Ijtermedizte |    17430 | In vitro cell cytotoxicity against 143B-LTK cell lines expressed in HSV-1 TK                                |                   |                  | Homo sapiens     |                | 143B              |

TableB:
|   assays_assay_id | assays_src_assay_id   |   assays_assay_tax_id | assays_assay_tissue   | assays_variant_id   | assays_assay_subcellular_fraction   |   assays_confidence_score | assays_assay_type   | assays_relationship_type   | assays_curated_by   |   assays_doc_id |   assays_tid |   assays_src_id | assays_chembl_id   | assays_cell_id   | assays_bao_format   | assays_tissue_id   |
|------------------:|:----------------------|----------------------:|:----------------------|:--------------------|:------------------------------------|--------------------------:|:--------------------|:---------------------------|:--------------------|----------------:|-------------:|----------------:|:-------------------|:-----------------|:--------------------|:-------------------|
|              7524 |                       |                 10116 | Kidney                |                     |                                     |                         1 | A                   | N                          | Intermediate        |            9866 |        50597 |               1 | CHEMBL618647       |                  | BAO_0000218         | 2113.0             |
|              7525 |                       |                 10116 | Kidney                |                     |                                     |                         1 | A                   | N                          | Intermediate        |            9866 |        50597 |               1 | CHEMBL618648       |                  | BAO_0000218         | 2113.0             |
|              7526 |                       |                 10116 | Kidney                |                     |                                     |                         1 | A                   | N                          | Intermediate        |            9866 |        50597 |               1 | CHEMBL618649       |                  | BAO_0000218         | 2113.0             |
|              7527 |                       |                 10116 | Liver                 |                     |                                     |                         1 | A                   | N                          | Intermediate        |            9866 |        50597 |               1 | CHEMBL618650       |                  | BAO_0000218         | 2107.0             |
|              7528 |                       |                 10116 | Liver                 |                     |                                     |                         1 | A                   | N                          | Intermediate        |            9866 |        50597 |               1 | CHEMBL618651       |                  | BAO_0000218         | 2107.0             |
|              7529 |                       |                 10116 | Liver                 |                     |                                     |                         1 | A                   | N                          | Intermediate        |            9866 |        50597 |               1 | CHEMBL876497       |                  | BAO_0000218         | 2107.0             |
|              7530 |                       |                 10116 | Lung                  |                     |                                     |                         1 | A                   | N                          | Intermediate        |            9866 |        50597 |               1 | CHEMBL618652       |                  | BAO_0000218         | 2048.0             |
|              7531 |                       |                 10116 | Lung                  |                     |                                     |                         1 | A                   | N                          | Intermediate        |            9866 |        50597 |               1 | CHEMBL618653       |                  | BAO_0000218         | 2048.0             |
|              7532 |                       |                 10116 | Lung                  |                     |                                     |                         1 | A                   | N                          | Intermediate        |            9866 |        50597 |               1 | CHEMBL618654       |                  | BAO_0000218         | 2048.0             |
|              7533 |                       |                 10116 |                       |                     |                                     |                         1 | A                   | N                          | Intermediate        |            6351 |        50597 |               1 | CHEMBL618655       |                  | BAO_0000218         |                    |



source_headers: assay_id
src_assay_id
assay_tax_id
assay_tissue
variant_id
assay_subcellular_fraction
confidence_score
assay_type
relationship_type
curated_by
doc_id
target_headers: assays_assay_id
assays_src_assay_id
assays_assay_tax_id
assays_assay_tissue
assays_variant_id
assays_assay_subcellular_fraction
assays_confidence_score
assays_assay_type
assays_relationship_type
assays_curated_by
assays_doc_id
column_mappings: assay_id
assays_assay_id
src_assay_id
assays_src_assay_id
assay_tax_id
assays_assay_tax_id
assay_tissue
assays_assay_tissue
variant_id
assays_variant_id
assay_subcellular_fraction
assays_assay_subcellular_fraction
confidence_score
assays_confidence_score
assay_type
assays_assay_type
relationship_type
assays_relationship_type
curated_by
assays_curated_by
doc_id
assays_doc_id
output: {"column_mappings": [["assay_id", "assays_assay_id"], ["src_assay_id", "assays_src_assay_id"], ["assay_tax_id", "assays_assay_tax_id"], ["assay_tissue", "assays_assay_tissue"], ["variant_id", "assays_variant_id"], ["assay_subcellular_fraction", "assays_assay_subcellular_fraction"], ["confidence_score", "assays_confidence_score"], ["assay_type", "assays_assay_type"], ["relationship_type", "assays_relationship_type"], ["curated_by", "assays_curated_by"], ["doc_id", "assays_doc_id"], ["description", null], ["assay_test_type", null], ["assay_category", null], ["assay_organism", null], ["assay_strain", null], ["assay_cell_type", null]]}