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_organism   | bao_format   | tissue_id   | variant_id   |   confidence_score | assay_tissue   | chembl_id    | assay_category   | curated_by   | assay_test_type   |   doc_id | src_assay_id   | relationship_type   |    tid |   src_id | description                                                                                                 | assay_type   | assay_tax_id   |
|-----------:|:-----------------|:-------------|:------------|:-------------|-------------------:|:---------------|:-------------|:-----------------|:-------------|:------------------|---------:|:---------------|:--------------------|-------:|---------:|:------------------------------------------------------------------------------------------------------------|:-------------|:---------------|
|          1 |                  | BAO_0000019  |             |              |                  8 |                | CHEMBL615117 |                  | Autocuration |                   |    11087 |                | H                   |  12052 |        1 | The compound was tested for the in vitro inhibition of platelet 12-lipoxygenase at a concentration of 30 uM | B            |                |
|          2 |                  | BAO_0000219  |             |              |                  0 |                | CHEMBL615118 |                  | Autocuration |                   |      684 |                | U                   |  22226 |        1 | Compound was evaluated for its ability to mobilize calcium in 1321NI cells                                  | F            |                |
|          3 |                  | BAO_0000019  |             |              |                  0 |                | CHEMBL615119 |                  | Autocuration |                   |    15453 |                | U                   |  22226 |        1 |                                                                                                             | B            |                |
|          4 | Bos taurus       | BAO_0000249  |             |              |                  4 |                | CHEMBL615120 |                  | Autocuration |                   |    17841 |                | H                   | 104729 |        1 | Binding affinity against A2 adenosine receptor in bovine striatal membranes using [3H]CGS-21680             | B            | 9913.0         |
|          5 | Homo sapiens     | BAO_0000219  |             |              |                  1 |                | CHEMBL615121 |                  | Intermediate |                   |    17430 |                | N                   |  80001 |        1 | In vitro cell cytotoxicity against 143-B cell lines (Human osteosarcoma cell line)                          | F            | 9606.0         |
|          6 | Homo sapiens     | BAO_0000219  |             |              |                  1 |                | CHEMBL615122 |                  | Intermediate |                   |    17430 |                | N                   |  80001 |        1 | In vitro cell cytotoxicity against 143-B cell lines (Human osteosarcoma cell line)                          | F            | 9606.0         |
|          7 | Mus musculus     | BAO_0000219  |             |              |                  1 |                | CHEMBL615123 |                  | Intermediate |                   |    13799 |                | N                   |  80001 |        1 | Cytotoxic Activity was evaluated against 143B (TK-) tumor cells                                             | F            | 10090.0        |
|          8 | Homo sapiens     | BAO_0000219  |             |              |                  1 |                | CHEMBL615124 |                  | Expert       |                   |    17774 |                | N                   |  80001 |        1 | In vitro cell cytotoxicity was determined against 143B cell line                                            | F            | 9606.0         |
|          9 | Homo sapiens     | BAO_0000219  |             |              |                  1 |                | CHEMBL615125 |                  | Intermediate |                   |     3801 |                | N                   |  80001 |        1 | Inhibitory activity against tumor osteosarcoma cell line 143B after 72 hr continuous exposure to compound   | F            | 9606.0         |
|         10 | Homo sapiens     | BAO_0000219  |             |              |                  1 |                | CHEMBL615126 |                  | Intermediate |                   |    17430 |                | N                   |  80001 |        1 | In vitro cell cytotoxicity against 143B-LTK cell lines expressed in HSV-1 TK                                | F            | 9606.0         |

TableB:
|   ss_d | ss_rgnsm          | b_frmt      | tss_d   | vrnt_d   |   cnfdnc_scr | ss_tss   | chmbl_d      | ss_ctgr   | crtd_b       | ss_tst_tp   |   dc_d | src_ss_d   | rltnshp_tp   |    td |   src_d | ss_strn   | ss_cll_tp   | ss_sbclllr_frctn   | cll_d   |
|-------:|:------------------|:------------|:--------|:---------|-------------:|:---------|:-------------|:----------|:-------------|:------------|-------:|:-----------|:-------------|------:|--------:|:----------|:------------|:-------------------|:--------|
|   7524 | Rattus norvegicus | BAO_0000218 | 2113.0  |          |            1 | Kidney   | CHEMBL618647 |           | Intermediate | In vivo     |   9866 |            | N            | 50597 |       1 |           |             |                    |         |
|   7525 | Rattus norvegicus | BAO_0000218 | 2113.0  |          |            1 | Kidney   | CHEMBL618648 |           | Intermediate | In vivo     |   9866 |            | N            | 50597 |       1 |           |             |                    |         |
|   7526 | Rattus norvegicus | BAO_0000218 | 2113.0  |          |            1 | Kidney   | CHEMBL618649 |           | Intermediate | In vivo     |   9866 |            | N            | 50597 |       1 |           |             |                    |         |
|   7527 | Rattus norvegicus | BAO_0000218 | 2107.0  |          |            1 | Liver    | CHEMBL618650 |           | Intermediate | In vivo     |   9866 |            | N            | 50597 |       1 |           |             |                    |         |
|   7528 | Rattus norvegicus | BAO_0000218 | 2107.0  |          |            1 | Liver    | CHEMBL618651 |           | Intermediate | In vivo     |   9866 |            | N            | 50597 |       1 |           |             |                    |         |
|   7529 | Rattus norvegicus | BAO_0000218 | 2107.0  |          |            1 | Liver    | CHEMBL876497 |           | Intermediate | In vivo     |   9866 |            | N            | 50597 |       1 |           |             |                    |         |
|   7530 | Rattus norvegicus | BAO_0000218 | 2048.0  |          |            1 | Lung     | CHEMBL618652 |           | Intermediate | In vivo     |   9866 |            | N            | 50597 |       1 |           |             |                    |         |
|   7531 | Rattus norvegicus | BAO_0000218 | 2048.0  |          |            1 | Lung     | CHEMBL618653 |           | Intermediate | In vivo     |   9866 |            | N            | 50597 |       1 |           |             |                    |         |
|   7532 | Rattus norvegicus | BAO_0000218 | 2048.0  |          |            1 | Lung     | CHEMBL618654 |           | Intermediate | In vivo     |   9866 |            | N            | 50597 |       1 |           |             |                    |         |
|   7533 | Rattus norvegicus | BAO_0000218 |         |          |            1 |          | CHEMBL618655 |           | Intermediate |             |   6351 |            | N            | 50597 |       1 |           |             |                    |         |



source_headers: assay_id
assay_organism
bao_format
tissue_id
variant_id
confidence_score
assay_tissue
chembl_id
assay_category
curated_by
assay_test_type
doc_id
src_assay_id
relationship_type
tid
src_id
target_headers: ss_d
ss_rgnsm
b_frmt
tss_d
vrnt_d
cnfdnc_scr
ss_tss
chmbl_d
ss_ctgr
crtd_b
ss_tst_tp
dc_d
src_ss_d
rltnshp_tp
td
src_d
column_mappings: assay_id
ss_d
assay_organism
ss_rgnsm
bao_format
b_frmt
tissue_id
tss_d
variant_id
vrnt_d
confidence_score
cnfdnc_scr
assay_tissue
ss_tss
chembl_id
chmbl_d
assay_category
ss_ctgr
curated_by
crtd_b
assay_test_type
ss_tst_tp
doc_id
dc_d
src_assay_id
src_ss_d
relationship_type
rltnshp_tp
tid
td
src_id
src_d
output: {"column_mappings": [["assay_id", "ss_d"], ["assay_organism", "ss_rgnsm"], ["bao_format", "b_frmt"], ["tissue_id", "tss_d"], ["variant_id", "vrnt_d"], ["confidence_score", "cnfdnc_scr"], ["assay_tissue", "ss_tss"], ["chembl_id", "chmbl_d"], ["assay_category", "ss_ctgr"], ["curated_by", "crtd_b"], ["assay_test_type", "ss_tst_tp"], ["doc_id", "dc_d"], ["src_assay_id", "src_ss_d"], ["relationship_type", "rltnshp_tp"], ["tid", "td"], ["src_id", "src_d"], ["description", null], ["assay_type", null], ["assay_tax_id", null]]}