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 |   confidence_score | src_assay_id   | bao_format   | curated_by   | tissue_id   |   doc_id | description                                                                                                 | assay_type   | assay_test_type   | assay_category   | assay_organism   | assay_tax_id   | assay_strain   |
|-----------:|-------------------:|:---------------|:-------------|:-------------|:------------|---------:|:------------------------------------------------------------------------------------------------------------|:-------------|:------------------|:-----------------|:-----------------|:---------------|:---------------|
|          1 |                  8 |                | BAO_0000019  | Autocuration |             |    11087 | The compound was tested for the in vitro inhibition of platelet 12-lipoxygenase at a concentration of 30 uM | B            |                   |                  |                  |                |                |
|          2 |                  0 |                | BAO_0000219  | Autocuration |             |      684 | Compound was evaluated for its ability to mobilize calcium in 1321NI cells                                  | F            |                   |                  |                  |                |                |
|          3 |                  0 |                | BAO_0000019  | Autocuration |             |    15453 |                                                                                                             | B            |                   |                  |                  |                |                |
|          4 |                  4 |                | BAO_0000249  | Autocuration |             |    17841 | Binding affinity against A2 adenosine receptor in bovine striatal membranes using [3H]CGS-21680             | B            |                   |                  | Bos taurus       | 9913.0         |                |
|          5 |                  1 |                | BAO_0000219  | Intermediate |             |    17430 | In vitro cell cytotoxicity against 143-B cell lines (Human osteosarcoma cell line)                          | F            |                   |                  | Homo sapiens     | 9606.0         |                |
|          6 |                  1 |                | BAO_0000219  | Intermediate |             |    17430 | In vitro cell cytotoxicity against 143-B cell lines (Human osteosarcoma cell line)                          | F            |                   |                  | Homo sapiens     | 9606.0         |                |
|          7 |                  1 |                | BAO_0000219  | Intermediate |             |    13799 | Cytotoxic Activity was evaluated against 143B (TK-) tumor cells                                             | F            |                   |                  | Mus musculus     | 10090.0        |                |
|          8 |                  1 |                | BAO_0000219  | Expert       |             |    17774 | In vitro cell cytotoxicity was determined against 143B cell line                                            | F            |                   |                  | Homo sapiens     | 9606.0         |                |
|          9 |                  1 |                | BAO_0000219  | Intermediate |             |     3801 | Inhibitory activity against tumor osteosarcoma cell line 143B after 72 hr continuous exposure to compound   | F            |                   |                  | Homo sapiens     | 9606.0         |                |
|         10 |                  1 |                | BAO_0000219  | Intermediate |             |    17430 | In vitro cell cytotoxicity against 143B-LTK cell lines expressed in HSV-1 TK                                | F            |                   |                  | Homo sapiens     | 9606.0         |                |

TableB:
|   ASSI |   CONSC | SRASI   | BAFO        | CUB          | TISI   | ASSTI   | ASCET   | ASSUBFR   |     Ti | RELATT   |   SI | CHI          | CEI   | VARI   |
|-------:|--------:|:--------|:------------|:-------------|:-------|:--------|:--------|:----------|-------:|:---------|-----:|:-------------|:------|:-------|
|      1 |       8 |         | BAO_0000019 | Autocuration |        |         |         |           |  12052 | H        |    1 | CHEMBL615117 |       |        |
|      2 |       0 |         | BAO_0000219 | Autocuration |        |         |         |           |  22226 | U        |    1 | CHEMBL615118 |       |        |
|      3 |       0 |         | BAO_0000019 | Autocuration |        |         |         |           |  22226 | U        |    1 | CHEMBL615119 |       |        |
|      4 |       4 |         | BAO_0000249 | Autocuration |        |         |         |           | 104729 | H        |    1 | CHEMBL615120 |       |        |
|      5 |       1 |         | BAO_0000219 | Intermediate |        |         | 143B    |           |  80001 | N        |    1 | CHEMBL615121 | 163.0 |        |
|      6 |       1 |         | BAO_0000219 | Intermediate |        |         | 143B    |           |  80001 | N        |    1 | CHEMBL615122 | 163.0 |        |
|      7 |       1 |         | BAO_0000219 | Intermediate |        |         | 143B    |           |  80001 | N        |    1 | CHEMBL615123 | 163.0 |        |
|      8 |       1 |         | BAO_0000219 | Expert       |        |         | 143B    |           |  80001 | N        |    1 | CHEMBL615124 | 163.0 |        |
|      9 |       1 |         | BAO_0000219 | Intermediate |        |         | 143B    |           |  80001 | N        |    1 | CHEMBL615125 | 163.0 |        |
|     10 |       1 |         | BAO_0000219 | Intermediate |        |         | 143B    |           |  80001 | N        |    1 | CHEMBL615126 | 163.0 |        |



source_headers: assay_id
confidence_score
src_assay_id
bao_format
curated_by
tissue_id
target_headers: ASSI
CONSC
SRASI
BAFO
CUB
TISI
column_mappings: assay_id
ASSI
confidence_score
CONSC
src_assay_id
SRASI
bao_format
BAFO
curated_by
CUB
tissue_id
TISI
output: {"column_mappings": [["assay_id", "ASSI"], ["confidence_score", "CONSC"], ["src_assay_id", "SRASI"], ["bao_format", "BAFO"], ["curated_by", "CUB"], ["tissue_id", "TISI"], ["doc_id", null], ["description", null], ["assay_type", null], ["assay_test_type", null], ["assay_category", null], ["assay_organism", null], ["assay_tax_id", null], ["assay_strain", null]]}