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_category   | assay_cell_type   | src_assay_id   | curated_by   | cell_id   |   doc_id | description                                                                                                 | assay_type   | assay_test_type   | assay_organism   | assay_tax_id   | assay_strain   | assay_tissue   |
|-----------:|:-----------------|:------------------|:---------------|:-------------|:----------|---------:|:------------------------------------------------------------------------------------------------------------|:-------------|:------------------|:-----------------|:---------------|:---------------|:---------------|
|          1 |                  |                   |                | Autoc8rafion |           |    11087 | The compound was tested for the in vitro inhibition of platelet 12-lipoxygenase at a concentration of 30 uM | B            |                   |                  |                |                |                |
|          2 |                  |                   |                | Autocurwti0n |           |      684 | Compound was evaluated for its ability to mobilize calcium in 1321NI cells                                  | F            |                   |                  |                |                |                |
|          3 |                  |                   |                | Au6ocufation |           |    15453 |                                                                                                             | B            |                   |                  |                |                |                |
|          4 |                  |                   |                | A6tocjration |           |    17841 | Binding affinity against A2 adenosine receptor in bovine striatal membranes using [3H]CGS-21680             | B            |                   | Bos taurus       | 9913.0         |                |                |
|          5 |                  | 143B              |                | Intermedkafe | 416.0     |    17430 | In vitro cell cytotoxicity against 143-B cell lines (Human osteosarcoma cell line)                          | F            |                   | Homo sapiens     | 9606.0         |                |                |
|          6 |                  | 143B              |                | Inrermediaye | 331.0     |    17430 | In vitro cell cytotoxicity against 143-B cell lines (Human osteosarcoma cell line)                          | F            |                   | Homo sapiens     | 9606.0         |                |                |
|          7 |                  | 143B              |                | Inyerjediate | 294.0     |    13799 | Cytotoxic Activity was evaluated against 143B (TK-) tumor cells                                             | F            |                   | Mus musculus     | 10090.0        |                |                |
|          8 |                  | 143B              |                | 2xpert       | 362.0     |    17774 | In vitro cell cytotoxicity was determined against 143B cell line                                            | F            |                   | Homo sapiens     | 9606.0         |                |                |
|          9 |                  | 143B              |                | Intermedis6e | 460.0     |     3801 | Inhibitory activity against tumor osteosarcoma cell line 143B after 72 hr continuous exposure to compound   | F            |                   | Homo sapiens     | 9606.0         |                |                |
|         10 |                  | 143B              |                | Internediare | 428.0     |    17430 | In vitro cell cytotoxicity against 143B-LTK cell lines expressed in HSV-1 TK                                | F            |                   | Homo sapiens     | 9606.0         |                |                |

TableB:
|   ss_d | ss_ctgr   | ss_cll_tp   | src_ss_d   | crtd_b       | cll_d   | ss_sbclllr_frctn   |    td | rltnshp_tp   |   cnfdnc_scr |   src_d | chmbl_d      | b_frmt      | tss_d   | vrnt_d   |
|-------:|:----------|:------------|:-----------|:-------------|:--------|:-------------------|------:|:-------------|-------------:|--------:|:-------------|:------------|:--------|:---------|
|   7524 |           |             |            | Intermediate |         |                    | 50597 | N            |            1 |       1 | CHEMBL618647 | BAO_0000218 | 2113.0  |          |
|   7525 |           |             |            | Intermediate |         |                    | 50597 | N            |            1 |       1 | CHEMBL618648 | BAO_0000218 | 2113.0  |          |
|   7526 |           |             |            | Intermediate |         |                    | 50597 | N            |            1 |       1 | CHEMBL618649 | BAO_0000218 | 2113.0  |          |
|   7527 |           |             |            | Intermediate |         |                    | 50597 | N            |            1 |       1 | CHEMBL618650 | BAO_0000218 | 2107.0  |          |
|   7528 |           |             |            | Intermediate |         |                    | 50597 | N            |            1 |       1 | CHEMBL618651 | BAO_0000218 | 2107.0  |          |
|   7529 |           |             |            | Intermediate |         |                    | 50597 | N            |            1 |       1 | CHEMBL876497 | BAO_0000218 | 2107.0  |          |
|   7530 |           |             |            | Intermediate |         |                    | 50597 | N            |            1 |       1 | CHEMBL618652 | BAO_0000218 | 2048.0  |          |
|   7531 |           |             |            | Intermediate |         |                    | 50597 | N            |            1 |       1 | CHEMBL618653 | BAO_0000218 | 2048.0  |          |
|   7532 |           |             |            | Intermediate |         |                    | 50597 | N            |            1 |       1 | CHEMBL618654 | BAO_0000218 | 2048.0  |          |
|   7533 |           |             |            | Intermediate |         |                    | 50597 | N            |            1 |       1 | CHEMBL618655 | BAO_0000218 |         |          |



source_headers: assay_id
assay_category
assay_cell_type
src_assay_id
curated_by
cell_id
target_headers: ss_d
ss_ctgr
ss_cll_tp
src_ss_d
crtd_b
cll_d
column_mappings: assay_id
ss_d
assay_category
ss_ctgr
assay_cell_type
ss_cll_tp
src_assay_id
src_ss_d
curated_by
crtd_b
cell_id
cll_d
output: {"column_mappings": [["assay_id", "ss_d"], ["assay_category", "ss_ctgr"], ["assay_cell_type", "ss_cll_tp"], ["src_assay_id", "src_ss_d"], ["curated_by", "crtd_b"], ["cell_id", "cll_d"], ["doc_id", null], ["description", null], ["assay_type", null], ["assay_test_type", null], ["assay_organism", null], ["assay_tax_id", null], ["assay_strain", null], ["assay_tissue", null]]}