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_test_type   |   doc_id | curated_by   | assay_tax_id   | assay_strain   |   src_id | description                                                                                                 | cell_id   | src_assay_id   | chembl_id    | assay_subcellular_fraction   |    tid | assay_organism   | assay_cell_type   | variant_id   | assay_type   | assay_category   | assay_tissue   |
|-----------:|:------------------|---------:|:-------------|:---------------|:---------------|---------:|:------------------------------------------------------------------------------------------------------------|:----------|:---------------|:-------------|:-----------------------------|-------:|:-----------------|:------------------|:-------------|:-------------|:-----------------|:---------------|
|          1 |                   |    11087 | Autocuration |                |                |        1 | The compound was tested for the in vitro inhibition of platelet 12-lipoxygenase at a concentration of 30 uM |           |                | CHEMBL615117 |                              |  12052 |                  |                   |              | B            |                  |                |
|          2 |                   |      684 | Autocuration |                |                |        1 | Compound was evaluated for its ability to mobilize calcium in 1321NI cells                                  |           |                | CHEMBL615118 |                              |  22226 |                  |                   |              | F            |                  |                |
|          3 |                   |    15453 | Autocuration |                |                |        1 |                                                                                                             |           |                | CHEMBL615119 |                              |  22226 |                  |                   |              | B            |                  |                |
|          4 |                   |    17841 | Autocuration | 9913.0         |                |        1 | Binding affinity against A2 adenosine receptor in bovine striatal membranes using [3H]CGS-21680             |           |                | CHEMBL615120 |                              | 104729 | Bos taurus       |                   |              | B            |                  |                |
|          5 |                   |    17430 | Intermediate | 9606.0         |                |        1 | In vitro cell cytotoxicity against 143-B cell lines (Human osteosarcoma cell line)                          | 163.0     |                | CHEMBL615121 |                              |  80001 | Homo sapiens     | 143B              |              | F            |                  |                |
|          6 |                   |    17430 | Intermediate | 9606.0         |                |        1 | In vitro cell cytotoxicity against 143-B cell lines (Human osteosarcoma cell line)                          | 163.0     |                | CHEMBL615122 |                              |  80001 | Homo sapiens     | 143B              |              | F            |                  |                |
|          7 |                   |    13799 | Intermediate | 10090.0        |                |        1 | Cytotoxic Activity was evaluated against 143B (TK-) tumor cells                                             | 163.0     |                | CHEMBL615123 |                              |  80001 | Mus musculus     | 143B              |              | F            |                  |                |
|          8 |                   |    17774 | Expert       | 9606.0         |                |        1 | In vitro cell cytotoxicity was determined against 143B cell line                                            | 163.0     |                | CHEMBL615124 |                              |  80001 | Homo sapiens     | 143B              |              | F            |                  |                |
|          9 |                   |     3801 | Intermediate | 9606.0         |                |        1 | Inhibitory activity against tumor osteosarcoma cell line 143B after 72 hr continuous exposure to compound   | 163.0     |                | CHEMBL615125 |                              |  80001 | Homo sapiens     | 143B              |              | F            |                  |                |
|         10 |                   |    17430 | Intermediate | 9606.0         |                |        1 | In vitro cell cytotoxicity against 143B-LTK cell lines expressed in HSV-1 TK                                | 163.0     |                | CHEMBL615126 |                              |  80001 | Homo sapiens     | 143B              |              | F            |                  |                |

TableB:
|   assays_ss_d | assays_ss_tst_tp   |   assays_dc_d | assays_crtd_b   |   assays_ss_tx_d | assays_ss_strn   |   assays_src_d | assays_dscrptn                                                                                           | assays_cll_d   | assays_src_ss_d   | assays_chmbl_d   | assays_ss_sbclllr_frctn   |   assays_td | assays_ss_rgnsm   | assays_ss_cll_tp   | assays_vrnt_d   | assays_rltnshp_tp   |   assays_cnfdnc_scr | assays_b_frmt   | assays_tss_d   |
|--------------:|:-------------------|--------------:|:----------------|-----------------:|:-----------------|---------------:|:---------------------------------------------------------------------------------------------------------|:---------------|:------------------|:-----------------|:--------------------------|------------:|:------------------|:-------------------|:----------------|:--------------------|--------------------:|:----------------|:---------------|
|          7524 | In vivo            |          9866 | Intermediate    |            10116 |                  |              1 | Biodistribution in normal rat kidney in the presence of 0.005 M Gd/0.01 M lig at 2 hr                    |                |                   | CHEMBL618647     |                           |       50597 | Rattus norvegicus |                    |                 | N                   |                   1 | BAO_0000218     | 2113.0         |
|          7525 | In vivo            |          9866 | Intermediate    |            10116 |                  |              1 | Biodistribution in normal rat kidney in the presence of 0.01 M Gd/0.05 M lig                             |                |                   | CHEMBL618648     |                           |       50597 | Rattus norvegicus |                    |                 | N                   |                   1 | BAO_0000218     | 2113.0         |
|          7526 | In vivo            |          9866 | Intermediate    |            10116 |                  |              1 | Biodistribution in normal rat kidney in the presence of NAC Gd 0.01 M lig at 2 hr                        |                |                   | CHEMBL618649     |                           |       50597 | Rattus norvegicus |                    |                 | N                   |                   1 | BAO_0000218     | 2113.0         |
|          7527 | In vivo            |          9866 | Intermediate    |            10116 |                  |              1 | Biodistribution in normal rat liver in the presence of 0.005 M Gd/0.01 M lig at 2 hr                     |                |                   | CHEMBL618650     |                           |       50597 | Rattus norvegicus |                    |                 | N                   |                   1 | BAO_0000218     | 2107.0         |
|          7528 | In vivo            |          9866 | Intermediate    |            10116 |                  |              1 | Biodistribution in normal rat liver in the presence of 0.01 M Gd/0.05 M lig                              |                |                   | CHEMBL618651     |                           |       50597 | Rattus norvegicus |                    |                 | N                   |                   1 | BAO_0000218     | 2107.0         |
|          7529 | In vivo            |          9866 | Intermediate    |            10116 |                  |              1 | Biodistribution in normal rat liver in the presence of NAC Gd 0.01 M lig at 2 hr                         |                |                   | CHEMBL876497     |                           |       50597 | Rattus norvegicus |                    |                 | N                   |                   1 | BAO_0000218     | 2107.0         |
|          7530 | In vivo            |          9866 | Intermediate    |            10116 |                  |              1 | Biodistribution in normal rat lung in the presence of 0.005 M Gd/0.01 M lig at 2 hr                      |                |                   | CHEMBL618652     |                           |       50597 | Rattus norvegicus |                    |                 | N                   |                   1 | BAO_0000218     | 2048.0         |
|          7531 | In vivo            |          9866 | Intermediate    |            10116 |                  |              1 | Biodistribution in normal rat lung in the presence of 0.01 M Gd/0.05 M lig                               |                |                   | CHEMBL618653     |                           |       50597 | Rattus norvegicus |                    |                 | N                   |                   1 | BAO_0000218     | 2048.0         |
|          7532 | In vivo            |          9866 | Intermediate    |            10116 |                  |              1 | Biodistribution in normal rat lung in the presence of NAC Gd 0.01 M lig at 2 hr                          |                |                   | CHEMBL618654     |                           |       50597 | Rattus norvegicus |                    |                 | N                   |                   1 | BAO_0000218     | 2048.0         |
|          7533 |                    |          6351 | Intermediate    |            10116 |                  |              1 | Recovery rate from urine and bile was determined after iv administration at 20 mg/kg in rats; Not tested |                |                   | CHEMBL618655     |                           |       50597 | Rattus norvegicus |                    |                 | N                   |                   1 | BAO_0000218     |                |



source_headers: assay_id
assay_test_type
doc_id
curated_by
assay_tax_id
assay_strain
src_id
description
cell_id
src_assay_id
chembl_id
assay_subcellular_fraction
tid
assay_organism
assay_cell_type
variant_id
target_headers: assays_ss_d
assays_ss_tst_tp
assays_dc_d
assays_crtd_b
assays_ss_tx_d
assays_ss_strn
assays_src_d
assays_dscrptn
assays_cll_d
assays_src_ss_d
assays_chmbl_d
assays_ss_sbclllr_frctn
assays_td
assays_ss_rgnsm
assays_ss_cll_tp
assays_vrnt_d
column_mappings: assay_id
assays_ss_d
assay_test_type
assays_ss_tst_tp
doc_id
assays_dc_d
curated_by
assays_crtd_b
assay_tax_id
assays_ss_tx_d
assay_strain
assays_ss_strn
src_id
assays_src_d
description
assays_dscrptn
cell_id
assays_cll_d
src_assay_id
assays_src_ss_d
chembl_id
assays_chmbl_d
assay_subcellular_fraction
assays_ss_sbclllr_frctn
tid
assays_td
assay_organism
assays_ss_rgnsm
assay_cell_type
assays_ss_cll_tp
variant_id
assays_vrnt_d
output: {"column_mappings": [["assay_id", "assays_ss_d"], ["assay_test_type", "assays_ss_tst_tp"], ["doc_id", "assays_dc_d"], ["curated_by", "assays_crtd_b"], ["assay_tax_id", "assays_ss_tx_d"], ["assay_strain", "assays_ss_strn"], ["src_id", "assays_src_d"], ["description", "assays_dscrptn"], ["cell_id", "assays_cll_d"], ["src_assay_id", "assays_src_ss_d"], ["chembl_id", "assays_chmbl_d"], ["assay_subcellular_fraction", "assays_ss_sbclllr_frctn"], ["tid", "assays_td"], ["assay_organism", "assays_ss_rgnsm"], ["assay_cell_type", "assays_ss_cll_tp"], ["variant_id", "assays_vrnt_d"], ["assay_type", null], ["assay_category", null], ["assay_tissue", null]]}