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

TableB:
|   ss_d |   cnfdnc_scr | ss_rgnsm          | dscrptn                                                                                                  | ss_tp   |   ss_tx_d | ss_tss   | ss_sbclllr_frctn   | ss_ctgr   | chmbl_d      |   dc_d | rltnshp_tp   | b_frmt      |   src_d | tss_d   | ss_tst_tp   | crtd_b       | src_ss_d   | cll_d   | vrnt_d   |
|-------:|-------------:|:------------------|:---------------------------------------------------------------------------------------------------------|:--------|----------:|:---------|:-------------------|:----------|:-------------|-------:|:-------------|:------------|--------:|:--------|:------------|:-------------|:-----------|:--------|:---------|
|   7524 |            1 | Rattus norvegicus | Biodistribution in normal rat kidney in the presence of 0.005 M Gd/0.01 M lig at 2 hr                    | A       |     10116 | Kidney   |                    |           | CHEMBL618647 |   9866 | N            | BAO_0000218 |       1 | 2113.0  | In vivo     | Intermediate |            |         |          |
|   7525 |            1 | Rattus norvegicus | Biodistribution in normal rat kidney in the presence of 0.01 M Gd/0.05 M lig                             | A       |     10116 | Kidney   |                    |           | CHEMBL618648 |   9866 | N            | BAO_0000218 |       1 | 2113.0  | In vivo     | Intermediate |            |         |          |
|   7526 |            1 | Rattus norvegicus | Biodistribution in normal rat kidney in the presence of NAC Gd 0.01 M lig at 2 hr                        | A       |     10116 | Kidney   |                    |           | CHEMBL618649 |   9866 | N            | BAO_0000218 |       1 | 2113.0  | In vivo     | Intermediate |            |         |          |
|   7527 |            1 | Rattus norvegicus | Biodistribution in normal rat liver in the presence of 0.005 M Gd/0.01 M lig at 2 hr                     | A       |     10116 | Liver    |                    |           | CHEMBL618650 |   9866 | N            | BAO_0000218 |       1 | 2107.0  | In vivo     | Intermediate |            |         |          |
|   7528 |            1 | Rattus norvegicus | Biodistribution in normal rat liver in the presence of 0.01 M Gd/0.05 M lig                              | A       |     10116 | Liver    |                    |           | CHEMBL618651 |   9866 | N            | BAO_0000218 |       1 | 2107.0  | In vivo     | Intermediate |            |         |          |
|   7529 |            1 | Rattus norvegicus | Biodistribution in normal rat liver in the presence of NAC Gd 0.01 M lig at 2 hr                         | A       |     10116 | Liver    |                    |           | CHEMBL876497 |   9866 | N            | BAO_0000218 |       1 | 2107.0  | In vivo     | Intermediate |            |         |          |
|   7530 |            1 | Rattus norvegicus | Biodistribution in normal rat lung in the presence of 0.005 M Gd/0.01 M lig at 2 hr                      | A       |     10116 | Lung     |                    |           | CHEMBL618652 |   9866 | N            | BAO_0000218 |       1 | 2048.0  | In vivo     | Intermediate |            |         |          |
|   7531 |            1 | Rattus norvegicus | Biodistribution in normal rat lung in the presence of 0.01 M Gd/0.05 M lig                               | A       |     10116 | Lung     |                    |           | CHEMBL618653 |   9866 | N            | BAO_0000218 |       1 | 2048.0  | In vivo     | Intermediate |            |         |          |
|   7532 |            1 | Rattus norvegicus | Biodistribution in normal rat lung in the presence of NAC Gd 0.01 M lig at 2 hr                          | A       |     10116 | Lung     |                    |           | CHEMBL618654 |   9866 | N            | BAO_0000218 |       1 | 2048.0  | In vivo     | Intermediate |            |         |          |
|   7533 |            1 | Rattus norvegicus | Recovery rate from urine and bile was determined after iv administration at 20 mg/kg in rats; Not tested | A       |     10116 |          |                    |           | CHEMBL618655 |   6351 | N            | BAO_0000218 |       1 |         |             | Intermediate |            |         |          |



source_headers: assay_id
confidence_score
assay_organism
description
assay_type
assay_tax_id
assay_tissue
assay_subcellular_fraction
assay_category
chembl_id
doc_id
relationship_type
bao_format
src_id
tissue_id
assay_test_type
target_headers: ss_d
cnfdnc_scr
ss_rgnsm
dscrptn
ss_tp
ss_tx_d
ss_tss
ss_sbclllr_frctn
ss_ctgr
chmbl_d
dc_d
rltnshp_tp
b_frmt
src_d
tss_d
ss_tst_tp
column_mappings: assay_id
ss_d
confidence_score
cnfdnc_scr
assay_organism
ss_rgnsm
description
dscrptn
assay_type
ss_tp
assay_tax_id
ss_tx_d
assay_tissue
ss_tss
assay_subcellular_fraction
ss_sbclllr_frctn
assay_category
ss_ctgr
chembl_id
chmbl_d
doc_id
dc_d
relationship_type
rltnshp_tp
bao_format
b_frmt
src_id
src_d
tissue_id
tss_d
assay_test_type
ss_tst_tp
output: {"column_mappings": [["assay_id", "ss_d"], ["confidence_score", "cnfdnc_scr"], ["assay_organism", "ss_rgnsm"], ["description", "dscrptn"], ["assay_type", "ss_tp"], ["assay_tax_id", "ss_tx_d"], ["assay_tissue", "ss_tss"], ["assay_subcellular_fraction", "ss_sbclllr_frctn"], ["assay_category", "ss_ctgr"], ["chembl_id", "chmbl_d"], ["doc_id", "dc_d"], ["relationship_type", "rltnshp_tp"], ["bao_format", "b_frmt"], ["src_id", "src_d"], ["tissue_id", "tss_d"], ["assay_test_type", "ss_tst_tp"], ["assay_strain", null], ["assay_cell_type", null], ["tid", null]]}