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

TableB:
|   ss_d | ss_tx_d   | chmbl_d      | vrnt_d   |     td | ss_tp   | ss_rgnsm     | crtd_b       | ss_sbclllr_frctn   | ss_cll_tp   | dscrptn                                                                                                     | ss_ctgr   | rltnshp_tp   |   cnfdnc_scr |   dc_d | tss_d   |   src_d | src_ss_d   | cll_d   | b_frmt      |
|-------:|:----------|:-------------|:---------|-------:|:--------|:-------------|:-------------|:-------------------|:------------|:------------------------------------------------------------------------------------------------------------|:----------|:-------------|-------------:|-------:|:--------|--------:|:-----------|:--------|:------------|
|      1 |           | CHEMBL615117 |          |  12052 | B       |              | Autocuration |                    |             | The compound was tested for the in vitro inhibition of platelet 12-lipoxygenase at a concentration of 30 uM |           | H            |            8 |  11087 |         |       1 |            |         | BAO_0000019 |
|      2 |           | CHEMBL615118 |          |  22226 | F       |              | Autocuration |                    |             | Compound was evaluated for its ability to mobilize calcium in 1321NI cells                                  |           | U            |            0 |    684 |         |       1 |            |         | BAO_0000219 |
|      3 |           | CHEMBL615119 |          |  22226 | B       |              | Autocuration |                    |             |                                                                                                             |           | U            |            0 |  15453 |         |       1 |            |         | BAO_0000019 |
|      4 | 9913.0    | CHEMBL615120 |          | 104729 | B       | Bos taurus   | Autocuration |                    |             | Binding affinity against A2 adenosine receptor in bovine striatal membranes using [3H]CGS-21680             |           | H            |            4 |  17841 |         |       1 |            |         | BAO_0000249 |
|      5 | 9606.0    | CHEMBL615121 |          |  80001 | F       | Homo sapiens | Intermediate |                    | 143B        | In vitro cell cytotoxicity against 143-B cell lines (Human osteosarcoma cell line)                          |           | N            |            1 |  17430 |         |       1 |            | 163.0   | BAO_0000219 |
|      6 | 9606.0    | CHEMBL615122 |          |  80001 | F       | Homo sapiens | Intermediate |                    | 143B        | In vitro cell cytotoxicity against 143-B cell lines (Human osteosarcoma cell line)                          |           | N            |            1 |  17430 |         |       1 |            | 163.0   | BAO_0000219 |
|      7 | 10090.0   | CHEMBL615123 |          |  80001 | F       | Mus musculus | Intermediate |                    | 143B        | Cytotoxic Activity was evaluated against 143B (TK-) tumor cells                                             |           | N            |            1 |  13799 |         |       1 |            | 163.0   | BAO_0000219 |
|      8 | 9606.0    | CHEMBL615124 |          |  80001 | F       | Homo sapiens | Expert       |                    | 143B        | In vitro cell cytotoxicity was determined against 143B cell line                                            |           | N            |            1 |  17774 |         |       1 |            | 163.0   | BAO_0000219 |
|      9 | 9606.0    | CHEMBL615125 |          |  80001 | F       | Homo sapiens | Intermediate |                    | 143B        | Inhibitory activity against tumor osteosarcoma cell line 143B after 72 hr continuous exposure to compound   |           | N            |            1 |   3801 |         |       1 |            | 163.0   | BAO_0000219 |
|     10 | 9606.0    | CHEMBL615126 |          |  80001 | F       | Homo sapiens | Intermediate |                    | 143B        | In vitro cell cytotoxicity against 143B-LTK cell lines expressed in HSV-1 TK                                |           | N            |            1 |  17430 |         |       1 |            | 163.0   | BAO_0000219 |



source_headers: assay_id
assay_tax_id
chembl_id
variant_id
tid
assay_type
assay_organism
curated_by
assay_subcellular_fraction
assay_cell_type
description
assay_category
relationship_type
confidence_score
doc_id
tissue_id
target_headers: ss_d
ss_tx_d
chmbl_d
vrnt_d
td
ss_tp
ss_rgnsm
crtd_b
ss_sbclllr_frctn
ss_cll_tp
dscrptn
ss_ctgr
rltnshp_tp
cnfdnc_scr
dc_d
tss_d
column_mappings: assay_id
ss_d
assay_tax_id
ss_tx_d
chembl_id
chmbl_d
variant_id
vrnt_d
tid
td
assay_type
ss_tp
assay_organism
ss_rgnsm
curated_by
crtd_b
assay_subcellular_fraction
ss_sbclllr_frctn
assay_cell_type
ss_cll_tp
description
dscrptn
assay_category
ss_ctgr
relationship_type
rltnshp_tp
confidence_score
cnfdnc_scr
doc_id
dc_d
tissue_id
tss_d
output: {"column_mappings": [["assay_id", "ss_d"], ["assay_tax_id", "ss_tx_d"], ["chembl_id", "chmbl_d"], ["variant_id", "vrnt_d"], ["tid", "td"], ["assay_type", "ss_tp"], ["assay_organism", "ss_rgnsm"], ["curated_by", "crtd_b"], ["assay_subcellular_fraction", "ss_sbclllr_frctn"], ["assay_cell_type", "ss_cll_tp"], ["description", "dscrptn"], ["assay_category", "ss_ctgr"], ["relationship_type", "rltnshp_tp"], ["confidence_score", "cnfdnc_scr"], ["doc_id", "dc_d"], ["tissue_id", "tss_d"], ["assay_test_type", null], ["assay_strain", null], ["assay_tissue", null]]}