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 | chembl_id    | curated_by   | assay_tissue   | tissue_id   | assay_subcellular_fraction   |   doc_id | cell_id   | bao_format   | variant_id   | assay_cell_type   | description                                                                                                 | assay_type   | assay_test_type   | assay_category   | assay_organism   | assay_tax_id   |
|-----------:|:-------------|:-------------|:---------------|:------------|:-----------------------------|---------:|:----------|:-------------|:-------------|:------------------|:------------------------------------------------------------------------------------------------------------|:-------------|:------------------|:-----------------|:-----------------|:---------------|
|          1 | CH3hBL615117 | zuhocuration |                |             |                              |    11087 |           | Bx90000019   |              |                   | The compound was tested for the in vitro inhibition of platelet 12-lipoxygenase at a concentration of 30 uM | B            |                   |                  |                  |                |
|          2 | CgEMBL616118 | wutosuration |                |             |                              |      684 |           | BAO000p218   |              |                   | Compound was evaluated for its ability to mobilize calcium in 1321NI cells                                  | F            |                   |                  |                  |                |
|          3 | CHfMBL615w19 | Autoduratiob |                |             |                              |    15453 |           | vAO00000w9   |              |                   |                                                                                                             | B            |                   |                  |                  |                |
|          4 | CgdMBL615120 | Auhochration |                |             |                              |    17841 |           | BwO0000149   |              |                   | Binding affinity against A2 adenosine receptor in bovine striatal membranes using [3H]CGS-21680             | B            |                   |                  | Bos taurus       | 9913.0         |
|          5 | CHdMBLu15121 | Internedizte |                |             |                              |    17430 | 397.0     | BAO0o00e19   |              | 143B              | In vitro cell cytotoxicity against 143-B cell lines (Human osteosarcoma cell line)                          | F            |                   |                  | Homo sapiens     | 9606.0         |
|          6 | CHEMBi61t122 | Ijtermediat2 |                |             |                              |    17430 | 241.0     | BAOp000w19   |              | 143B              | In vitro cell cytotoxicity against 143-B cell lines (Human osteosarcoma cell line)                          | F            |                   |                  | Homo sapiens     | 9606.0         |
|          7 | CHwMBL61t123 | 8ntermewiate |                |             |                              |    13799 | 203.0     | BA900002w9   |              | 143B              | Cytotoxic Activity was evaluated against 143B (TK-) tumor cells                                             | F            |                   |                  | Mus musculus     | 10090.0        |
|          8 | vHEMBL6q5124 | Expe4t       |                |             |                              |    17774 | 17.0      | nAO000021i   |              | 143B              | In vitro cell cytotoxicity was determined against 143B cell line                                            | F            |                   |                  | Homo sapiens     | 9606.0         |
|          9 | CHEkBLu15125 | 9nt3rmediate |                |             |                              |     3801 | 360.0     | BAO0p90219   |              | 143B              | Inhibitory activity against tumor osteosarcoma cell line 143B after 72 hr continuous exposure to compound   | F            |                   |                  | Homo sapiens     | 9606.0         |
|         10 | CHEMBL6wy126 | Int2rmedixte |                |             |                              |    17430 | 296.0     | BzOo000219   |              | 143B              | In vitro cell cytotoxicity against 143B-LTK cell lines expressed in HSV-1 TK                                | F            |                   |                  | Homo sapiens     | 9606.0         |

TableB:
|   ss_d | chmbl_d      | crtd_b       | ss_tss   | tss_d   | ss_sbclllr_frctn   |   dc_d | cll_d   | b_frmt      | vrnt_d   | ss_cll_tp   | ss_strn   |     td | rltnshp_tp   |   cnfdnc_scr |   src_d | src_ss_d   |
|-------:|:-------------|:-------------|:---------|:--------|:-------------------|-------:|:--------|:------------|:---------|:------------|:----------|-------:|:-------------|-------------:|--------:|:-----------|
|      1 | CHEMBL615117 | Autocuration |          |         |                    |  11087 |         | BAO_0000019 |          |             |           |  12052 | H            |            8 |       1 |            |
|      2 | CHEMBL615118 | Autocuration |          |         |                    |    684 |         | BAO_0000219 |          |             |           |  22226 | U            |            0 |       1 |            |
|      3 | CHEMBL615119 | Autocuration |          |         |                    |  15453 |         | BAO_0000019 |          |             |           |  22226 | U            |            0 |       1 |            |
|      4 | CHEMBL615120 | Autocuration |          |         |                    |  17841 |         | BAO_0000249 |          |             |           | 104729 | H            |            4 |       1 |            |
|      5 | CHEMBL615121 | Intermediate |          |         |                    |  17430 | 163.0   | BAO_0000219 |          | 143B        |           |  80001 | N            |            1 |       1 |            |
|      6 | CHEMBL615122 | Intermediate |          |         |                    |  17430 | 163.0   | BAO_0000219 |          | 143B        |           |  80001 | N            |            1 |       1 |            |
|      7 | CHEMBL615123 | Intermediate |          |         |                    |  13799 | 163.0   | BAO_0000219 |          | 143B        |           |  80001 | N            |            1 |       1 |            |
|      8 | CHEMBL615124 | Expert       |          |         |                    |  17774 | 163.0   | BAO_0000219 |          | 143B        |           |  80001 | N            |            1 |       1 |            |
|      9 | CHEMBL615125 | Intermediate |          |         |                    |   3801 | 163.0   | BAO_0000219 |          | 143B        |           |  80001 | N            |            1 |       1 |            |
|     10 | CHEMBL615126 | Intermediate |          |         |                    |  17430 | 163.0   | BAO_0000219 |          | 143B        |           |  80001 | N            |            1 |       1 |            |



source_headers: assay_id
chembl_id
curated_by
assay_tissue
tissue_id
assay_subcellular_fraction
doc_id
cell_id
bao_format
variant_id
assay_cell_type
target_headers: ss_d
chmbl_d
crtd_b
ss_tss
tss_d
ss_sbclllr_frctn
dc_d
cll_d
b_frmt
vrnt_d
ss_cll_tp
column_mappings: assay_id
ss_d
chembl_id
chmbl_d
curated_by
crtd_b
assay_tissue
ss_tss
tissue_id
tss_d
assay_subcellular_fraction
ss_sbclllr_frctn
doc_id
dc_d
cell_id
cll_d
bao_format
b_frmt
variant_id
vrnt_d
assay_cell_type
ss_cll_tp
output: {"column_mappings": [["assay_id", "ss_d"], ["chembl_id", "chmbl_d"], ["curated_by", "crtd_b"], ["assay_tissue", "ss_tss"], ["tissue_id", "tss_d"], ["assay_subcellular_fraction", "ss_sbclllr_frctn"], ["doc_id", "dc_d"], ["cell_id", "cll_d"], ["bao_format", "b_frmt"], ["variant_id", "vrnt_d"], ["assay_cell_type", "ss_cll_tp"], ["description", null], ["assay_type", null], ["assay_test_type", null], ["assay_category", null], ["assay_organism", null], ["assay_tax_id", null]]}