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 | tissue_id   | bao_format   | variant_id   | relationship_type   | curated_by   | assay_strain   | assay_cell_type   | cell_id   |   src_id | assay_tissue   |    tid | assay_test_type   |   doc_id | assay_subcellular_fraction   | chembl_id    | description                                                                                                 | assay_type   | assay_category   |
|-----------:|:------------|:-------------|:-------------|:--------------------|:-------------|:---------------|:------------------|:----------|---------:|:---------------|-------:|:------------------|---------:|:-----------------------------|:-------------|:------------------------------------------------------------------------------------------------------------|:-------------|:-----------------|
|          1 |             | BAOp00001o   |              | H                   | Autocirxtion |                |                   |           |        1 |                |  12052 |                   |    11087 |                              | xHEMBL61r117 | The compound was tested for the in vitro inhibition of platelet 12-lipoxygenase at a concentration of 30 uM | B            |                  |
|          2 |             | BAk0090219   |              | U                   | Autocuda5ion |                |                   |           |        1 |                |  22226 |                   |      684 |                              | CHEjBL625118 | Compound was evaluated for its ability to mobilize calcium in 1321NI cells                                  | F            |                  |
|          3 |             | BA00000018   |              | U                   | qutocuratoon |                |                   |           |        1 |                |  22226 |                   |    15453 |                              | CH2MBLu15119 |                                                                                                             | B            |                  |
|          4 |             | BAO0op0249   |              | H                   | Autocueayion |                |                   |           |        1 |                | 104729 |                   |    17841 |                              | CHEMBL625220 | Binding affinity against A2 adenosine receptor in bovine striatal membranes using [3H]CGS-21680             | B            |                  |
|          5 |             | BA00090219   |              | N                   | Ihtermediat3 |                | 143B              | 608.0     |        1 |                |  80001 |                   |    17430 |                              | CHEMBk615q21 | In vitro cell cytotoxicity against 143-B cell lines (Human osteosarcoma cell line)                          | F            |                  |
|          6 |             | BAO0009218   |              | N                   | Interm2dia6e |                | 143B              | 461.0     |        1 |                |  80001 |                   |    17430 |                              | CHEMgi615122 | In vitro cell cytotoxicity against 143-B cell lines (Human osteosarcoma cell line)                          | F            |                  |
|          7 |             | gAO00002w9   |              | N                   | Intermedlafe |                | 143B              | 544.0     |        1 |                |  80001 |                   |    13799 |                              | CHEMBL6w5223 | Cytotoxic Activity was evaluated against 143B (TK-) tumor cells                                             | F            |                  |
|          8 |             | BAO0900210   |              | N                   | Expe3t       |                | 143B              | 406.0     |        1 |                |  80001 |                   |    17774 |                              | CHEMBp515124 | In vitro cell cytotoxicity was determined against 143B cell line                                            | F            |                  |
|          9 |             | BAO000022i   |              | N                   | Inhermediste |                | 143B              | 312.0     |        1 |                |  80001 |                   |     3801 |                              | CHEMBLu15225 | Inhibitory activity against tumor osteosarcoma cell line 143B after 72 hr continuous exposure to compound   | F            |                  |
|         10 |             | BAO00p02w9   |              | N                   | Inte3mesiate |                | 143B              | 401.0     |        1 |                |  80001 |                   |    17430 |                              | CHEMfL715126 | In vitro cell cytotoxicity against 143B-LTK cell lines expressed in HSV-1 TK                                | F            |                  |

TableB:
|   ss_d | tss_d   | b_frmt      | vrnt_d   | rltnshp_tp   | crtd_b       | ss_strn   | ss_cll_tp   | cll_d   |   src_d | ss_tss   |    td | ss_tst_tp   |   dc_d | ss_sbclllr_frctn   | chmbl_d      | ss_rgnsm          |   ss_tx_d |   cnfdnc_scr | src_ss_d   |
|-------:|:--------|:------------|:---------|:-------------|:-------------|:----------|:------------|:--------|--------:|:---------|------:|:------------|-------:|:-------------------|:-------------|:------------------|----------:|-------------:|:-----------|
|   7524 | 2113.0  | BAO_0000218 |          | N            | Intermediate |           |             |         |       1 | Kidney   | 50597 | In vivo     |   9866 |                    | CHEMBL618647 | Rattus norvegicus |     10116 |            1 |            |
|   7525 | 2113.0  | BAO_0000218 |          | N            | Intermediate |           |             |         |       1 | Kidney   | 50597 | In vivo     |   9866 |                    | CHEMBL618648 | Rattus norvegicus |     10116 |            1 |            |
|   7526 | 2113.0  | BAO_0000218 |          | N            | Intermediate |           |             |         |       1 | Kidney   | 50597 | In vivo     |   9866 |                    | CHEMBL618649 | Rattus norvegicus |     10116 |            1 |            |
|   7527 | 2107.0  | BAO_0000218 |          | N            | Intermediate |           |             |         |       1 | Liver    | 50597 | In vivo     |   9866 |                    | CHEMBL618650 | Rattus norvegicus |     10116 |            1 |            |
|   7528 | 2107.0  | BAO_0000218 |          | N            | Intermediate |           |             |         |       1 | Liver    | 50597 | In vivo     |   9866 |                    | CHEMBL618651 | Rattus norvegicus |     10116 |            1 |            |
|   7529 | 2107.0  | BAO_0000218 |          | N            | Intermediate |           |             |         |       1 | Liver    | 50597 | In vivo     |   9866 |                    | CHEMBL876497 | Rattus norvegicus |     10116 |            1 |            |
|   7530 | 2048.0  | BAO_0000218 |          | N            | Intermediate |           |             |         |       1 | Lung     | 50597 | In vivo     |   9866 |                    | CHEMBL618652 | Rattus norvegicus |     10116 |            1 |            |
|   7531 | 2048.0  | BAO_0000218 |          | N            | Intermediate |           |             |         |       1 | Lung     | 50597 | In vivo     |   9866 |                    | CHEMBL618653 | Rattus norvegicus |     10116 |            1 |            |
|   7532 | 2048.0  | BAO_0000218 |          | N            | Intermediate |           |             |         |       1 | Lung     | 50597 | In vivo     |   9866 |                    | CHEMBL618654 | Rattus norvegicus |     10116 |            1 |            |
|   7533 |         | BAO_0000218 |          | N            | Intermediate |           |             |         |       1 |          | 50597 |             |   6351 |                    | CHEMBL618655 | Rattus norvegicus |     10116 |            1 |            |



source_headers: assay_id
tissue_id
bao_format
variant_id
relationship_type
curated_by
assay_strain
assay_cell_type
cell_id
src_id
assay_tissue
tid
assay_test_type
doc_id
assay_subcellular_fraction
chembl_id
target_headers: ss_d
tss_d
b_frmt
vrnt_d
rltnshp_tp
crtd_b
ss_strn
ss_cll_tp
cll_d
src_d
ss_tss
td
ss_tst_tp
dc_d
ss_sbclllr_frctn
chmbl_d
column_mappings: assay_id
ss_d
tissue_id
tss_d
bao_format
b_frmt
variant_id
vrnt_d
relationship_type
rltnshp_tp
curated_by
crtd_b
assay_strain
ss_strn
assay_cell_type
ss_cll_tp
cell_id
cll_d
src_id
src_d
assay_tissue
ss_tss
tid
td
assay_test_type
ss_tst_tp
doc_id
dc_d
assay_subcellular_fraction
ss_sbclllr_frctn
chembl_id
chmbl_d
output: {"column_mappings": [["assay_id", "ss_d"], ["tissue_id", "tss_d"], ["bao_format", "b_frmt"], ["variant_id", "vrnt_d"], ["relationship_type", "rltnshp_tp"], ["curated_by", "crtd_b"], ["assay_strain", "ss_strn"], ["assay_cell_type", "ss_cll_tp"], ["cell_id", "cll_d"], ["src_id", "src_d"], ["assay_tissue", "ss_tss"], ["tid", "td"], ["assay_test_type", "ss_tst_tp"], ["doc_id", "dc_d"], ["assay_subcellular_fraction", "ss_sbclllr_frctn"], ["chembl_id", "chmbl_d"], ["description", null], ["assay_type", null], ["assay_category", null]]}