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_tissue   | relationship_type   | assay_tax_id   | tissue_id   | variant_id   |   doc_id | description                                                                                                 | assay_type   | assay_test_type   | assay_category   | assay_organism   | assay_strain   | assay_cell_type   |
|-----------:|:---------------|:--------------------|:---------------|:------------|:-------------|---------:|:------------------------------------------------------------------------------------------------------------|:-------------|:------------------|:-----------------|:-----------------|:---------------|:------------------|
|          1 |                | H                   |                |             |              |    11087 | The compound was tested for the in vitro inhibition of platelet 12-lipoxygenase at a concentration of 30 uM | B            |                   |                  |                  |                |                   |
|          2 |                | U                   |                |             |              |      684 | Compound was evaluated for its ability to mobilize calcium in 1321NI cells                                  | F            |                   |                  |                  |                |                   |
|          3 |                | U                   |                |             |              |    15453 |                                                                                                             | B            |                   |                  |                  |                |                   |
|          4 |                | H                   | 1687.0         |             |              |    17841 | Binding affinity against A2 adenosine receptor in bovine striatal membranes using [3H]CGS-21680             | B            |                   |                  | Bos taurus       |                |                   |
|          5 |                | N                   | 3154.0         |             |              |    17430 | In vitro cell cytotoxicity against 143-B cell lines (Human osteosarcoma cell line)                          | F            |                   |                  | Homo sapiens     |                | 143B              |
|          6 |                | N                   | 62257.0        |             |              |    17430 | In vitro cell cytotoxicity against 143-B cell lines (Human osteosarcoma cell line)                          | F            |                   |                  | Homo sapiens     |                | 143B              |
|          7 |                | N                   | 26151.0        |             |              |    13799 | Cytotoxic Activity was evaluated against 143B (TK-) tumor cells                                             | F            |                   |                  | Mus musculus     |                | 143B              |
|          8 |                | N                   | 7439.0         |             |              |    17774 | In vitro cell cytotoxicity was determined against 143B cell line                                            | F            |                   |                  | Homo sapiens     |                | 143B              |
|          9 |                | N                   | 12588.0        |             |              |     3801 | Inhibitory activity against tumor osteosarcoma cell line 143B after 72 hr continuous exposure to compound   | F            |                   |                  | Homo sapiens     |                | 143B              |
|         10 |                | N                   | 57210.0        |             |              |    17430 | In vitro cell cytotoxicity against 143B-LTK cell lines expressed in HSV-1 TK                                | F            |                   |                  | Homo sapiens     |                | 143B              |

TableB:
|   assays_ASSI | assays_ASSTI   | assays_RELATITY   | assays_ASTI   | assays_TISI   | assays_VAI   | assays_ASSUBCEFRAC   |   assays_T |   assays_CONFISCO | assays_CURB   |   assays_SRI | assays_SRASSI   | assays_CHI   | assays_CI   | assays_BAFOR   |
|--------------:|:---------------|:------------------|:--------------|:--------------|:-------------|:---------------------|-----------:|------------------:|:--------------|-------------:|:----------------|:-------------|:------------|:---------------|
|             1 |                | H                 |               |               |              |                      |      12052 |                 8 | Autocuration  |            1 |                 | CHEMBL615117 |             | BAO_0000019    |
|             2 |                | U                 |               |               |              |                      |      22226 |                 0 | Autocuration  |            1 |                 | CHEMBL615118 |             | BAO_0000219    |
|             3 |                | U                 |               |               |              |                      |      22226 |                 0 | Autocuration  |            1 |                 | CHEMBL615119 |             | BAO_0000019    |
|             4 |                | H                 | 9913.0        |               |              |                      |     104729 |                 4 | Autocuration  |            1 |                 | CHEMBL615120 |             | BAO_0000249    |
|             5 |                | N                 | 9606.0        |               |              |                      |      80001 |                 1 | Intermediate  |            1 |                 | CHEMBL615121 | 163.0       | BAO_0000219    |
|             6 |                | N                 | 9606.0        |               |              |                      |      80001 |                 1 | Intermediate  |            1 |                 | CHEMBL615122 | 163.0       | BAO_0000219    |
|             7 |                | N                 | 10090.0       |               |              |                      |      80001 |                 1 | Intermediate  |            1 |                 | CHEMBL615123 | 163.0       | BAO_0000219    |
|             8 |                | N                 | 9606.0        |               |              |                      |      80001 |                 1 | Expert        |            1 |                 | CHEMBL615124 | 163.0       | BAO_0000219    |
|             9 |                | N                 | 9606.0        |               |              |                      |      80001 |                 1 | Intermediate  |            1 |                 | CHEMBL615125 | 163.0       | BAO_0000219    |
|            10 |                | N                 | 9606.0        |               |              |                      |      80001 |                 1 | Intermediate  |            1 |                 | CHEMBL615126 | 163.0       | BAO_0000219    |



source_headers: assay_id
assay_tissue
relationship_type
assay_tax_id
tissue_id
variant_id
target_headers: assays_ASSI
assays_ASSTI
assays_RELATITY
assays_ASTI
assays_TISI
assays_VAI
column_mappings: assay_id
assays_ASSI
assay_tissue
assays_ASSTI
relationship_type
assays_RELATITY
assay_tax_id
assays_ASTI
tissue_id
assays_TISI
variant_id
assays_VAI
output: {"column_mappings": [["assay_id", "assays_ASSI"], ["assay_tissue", "assays_ASSTI"], ["relationship_type", "assays_RELATITY"], ["assay_tax_id", "assays_ASTI"], ["tissue_id", "assays_TISI"], ["variant_id", "assays_VAI"], ["doc_id", null], ["description", null], ["assay_type", null], ["assay_test_type", null], ["assay_category", null], ["assay_organism", null], ["assay_strain", null], ["assay_cell_type", null]]}