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

TableB:
|   assays_ss_d | assays_dscrptn                                                                                              |   assays_src_d | assays_rltnshp_tp   | assays_src_ss_d   | assays_ss_rgnsm   | assays_vrnt_d   | assays_ss_sbclllr_frctn   | assays_ss_ctgr   | assays_ss_tss   | assays_ss_cll_tp   | assays_tss_d   | assays_b_frmt   | assays_chmbl_d   |   assays_cnfdnc_scr | assays_crtd_b   | assays_ss_tx_d   | assays_ss_strn   |   assays_td | assays_cll_d   |
|--------------:|:------------------------------------------------------------------------------------------------------------|---------------:|:--------------------|:------------------|:------------------|:----------------|:--------------------------|:-----------------|:----------------|:-------------------|:---------------|:----------------|:-----------------|--------------------:|:----------------|:-----------------|:-----------------|------------:|:---------------|
|             1 | The compound was tested for the in vitro inhibition of platelet 12-lipoxygenase at a concentration of 30 uM |              1 | H                   |                   |                   |                 |                           |                  |                 |                    |                | BAO_0000019     | CHEMBL615117     |                   8 | Autocuration    |                  |                  |       12052 |                |
|             2 | Compound was evaluated for its ability to mobilize calcium in 1321NI cells                                  |              1 | U                   |                   |                   |                 |                           |                  |                 |                    |                | BAO_0000219     | CHEMBL615118     |                   0 | Autocuration    |                  |                  |       22226 |                |
|             3 |                                                                                                             |              1 | U                   |                   |                   |                 |                           |                  |                 |                    |                | BAO_0000019     | CHEMBL615119     |                   0 | Autocuration    |                  |                  |       22226 |                |
|             4 | Binding affinity against A2 adenosine receptor in bovine striatal membranes using [3H]CGS-21680             |              1 | H                   |                   | Bos taurus        |                 |                           |                  |                 |                    |                | BAO_0000249     | CHEMBL615120     |                   4 | Autocuration    | 9913.0           |                  |      104729 |                |
|             5 | In vitro cell cytotoxicity against 143-B cell lines (Human osteosarcoma cell line)                          |              1 | N                   |                   | Homo sapiens      |                 |                           |                  |                 | 143B               |                | BAO_0000219     | CHEMBL615121     |                   1 | Intermediate    | 9606.0           |                  |       80001 | 163.0          |
|             6 | In vitro cell cytotoxicity against 143-B cell lines (Human osteosarcoma cell line)                          |              1 | N                   |                   | Homo sapiens      |                 |                           |                  |                 | 143B               |                | BAO_0000219     | CHEMBL615122     |                   1 | Intermediate    | 9606.0           |                  |       80001 | 163.0          |
|             7 | Cytotoxic Activity was evaluated against 143B (TK-) tumor cells                                             |              1 | N                   |                   | Mus musculus      |                 |                           |                  |                 | 143B               |                | BAO_0000219     | CHEMBL615123     |                   1 | Intermediate    | 10090.0          |                  |       80001 | 163.0          |
|             8 | In vitro cell cytotoxicity was determined against 143B cell line                                            |              1 | N                   |                   | Homo sapiens      |                 |                           |                  |                 | 143B               |                | BAO_0000219     | CHEMBL615124     |                   1 | Expert          | 9606.0           |                  |       80001 | 163.0          |
|             9 | Inhibitory activity against tumor osteosarcoma cell line 143B after 72 hr continuous exposure to compound   |              1 | N                   |                   | Homo sapiens      |                 |                           |                  |                 | 143B               |                | BAO_0000219     | CHEMBL615125     |                   1 | Intermediate    | 9606.0           |                  |       80001 | 163.0          |
|            10 | In vitro cell cytotoxicity against 143B-LTK cell lines expressed in HSV-1 TK                                |              1 | N                   |                   | Homo sapiens      |                 |                           |                  |                 | 143B               |                | BAO_0000219     | CHEMBL615126     |                   1 | Intermediate    | 9606.0           |                  |       80001 | 163.0          |



source_headers: assay_id
description
src_id
relationship_type
src_assay_id
assay_organism
variant_id
assay_subcellular_fraction
assay_category
assay_tissue
assay_cell_type
tissue_id
bao_format
chembl_id
confidence_score
curated_by
target_headers: assays_ss_d
assays_dscrptn
assays_src_d
assays_rltnshp_tp
assays_src_ss_d
assays_ss_rgnsm
assays_vrnt_d
assays_ss_sbclllr_frctn
assays_ss_ctgr
assays_ss_tss
assays_ss_cll_tp
assays_tss_d
assays_b_frmt
assays_chmbl_d
assays_cnfdnc_scr
assays_crtd_b
column_mappings: assay_id
assays_ss_d
description
assays_dscrptn
src_id
assays_src_d
relationship_type
assays_rltnshp_tp
src_assay_id
assays_src_ss_d
assay_organism
assays_ss_rgnsm
variant_id
assays_vrnt_d
assay_subcellular_fraction
assays_ss_sbclllr_frctn
assay_category
assays_ss_ctgr
assay_tissue
assays_ss_tss
assay_cell_type
assays_ss_cll_tp
tissue_id
assays_tss_d
bao_format
assays_b_frmt
chembl_id
assays_chmbl_d
confidence_score
assays_cnfdnc_scr
curated_by
assays_crtd_b
output: {"column_mappings": [["assay_id", "assays_ss_d"], ["description", "assays_dscrptn"], ["src_id", "assays_src_d"], ["relationship_type", "assays_rltnshp_tp"], ["src_assay_id", "assays_src_ss_d"], ["assay_organism", "assays_ss_rgnsm"], ["variant_id", "assays_vrnt_d"], ["assay_subcellular_fraction", "assays_ss_sbclllr_frctn"], ["assay_category", "assays_ss_ctgr"], ["assay_tissue", "assays_ss_tss"], ["assay_cell_type", "assays_ss_cll_tp"], ["tissue_id", "assays_tss_d"], ["bao_format", "assays_b_frmt"], ["chembl_id", "assays_chmbl_d"], ["confidence_score", "assays_cnfdnc_scr"], ["curated_by", "assays_crtd_b"], ["doc_id", null], ["assay_type", null], ["assay_test_type", null]]}