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

TableB:
|   ss_d | ss_sbclllr_frctn   | ss_tst_tp   | ss_tp   | tss_d   |   ss_tx_d | rltnshp_tp   |   cnfdnc_scr | crtd_b       |   src_d | src_ss_d   | chmbl_d      | cll_d   | b_frmt      | vrnt_d   |
|-------:|:-------------------|:------------|:--------|:--------|----------:|:-------------|-------------:|:-------------|--------:|:-----------|:-------------|:--------|:------------|:---------|
|   7524 |                    | In vivo     | A       | 2113.0  |     10116 | N            |            1 | Intermediate |       1 |            | CHEMBL618647 |         | BAO_0000218 |          |
|   7525 |                    | In vivo     | A       | 2113.0  |     10116 | N            |            1 | Intermediate |       1 |            | CHEMBL618648 |         | BAO_0000218 |          |
|   7526 |                    | In vivo     | A       | 2113.0  |     10116 | N            |            1 | Intermediate |       1 |            | CHEMBL618649 |         | BAO_0000218 |          |
|   7527 |                    | In vivo     | A       | 2107.0  |     10116 | N            |            1 | Intermediate |       1 |            | CHEMBL618650 |         | BAO_0000218 |          |
|   7528 |                    | In vivo     | A       | 2107.0  |     10116 | N            |            1 | Intermediate |       1 |            | CHEMBL618651 |         | BAO_0000218 |          |
|   7529 |                    | In vivo     | A       | 2107.0  |     10116 | N            |            1 | Intermediate |       1 |            | CHEMBL876497 |         | BAO_0000218 |          |
|   7530 |                    | In vivo     | A       | 2048.0  |     10116 | N            |            1 | Intermediate |       1 |            | CHEMBL618652 |         | BAO_0000218 |          |
|   7531 |                    | In vivo     | A       | 2048.0  |     10116 | N            |            1 | Intermediate |       1 |            | CHEMBL618653 |         | BAO_0000218 |          |
|   7532 |                    | In vivo     | A       | 2048.0  |     10116 | N            |            1 | Intermediate |       1 |            | CHEMBL618654 |         | BAO_0000218 |          |
|   7533 |                    |             | A       |         |     10116 | N            |            1 | Intermediate |       1 |            | CHEMBL618655 |         | BAO_0000218 |          |



source_headers: assay_id
assay_subcellular_fraction
assay_test_type
assay_type
tissue_id
assay_tax_id
target_headers: ss_d
ss_sbclllr_frctn
ss_tst_tp
ss_tp
tss_d
ss_tx_d
column_mappings: assay_id
ss_d
assay_subcellular_fraction
ss_sbclllr_frctn
assay_test_type
ss_tst_tp
assay_type
ss_tp
tissue_id
tss_d
assay_tax_id
ss_tx_d
output: {"column_mappings": [["assay_id", "ss_d"], ["assay_subcellular_fraction", "ss_sbclllr_frctn"], ["assay_test_type", "ss_tst_tp"], ["assay_type", "ss_tp"], ["tissue_id", "tss_d"], ["assay_tax_id", "ss_tx_d"], ["doc_id", null], ["description", null], ["assay_category", null], ["assay_organism", null], ["assay_strain", null], ["assay_tissue", null], ["assay_cell_type", null], ["tid", null]]}