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

TableB:
|   assays_ss_d | assays_ss_tss   |   assays_dc_d | assays_tss_d   | assays_ss_rgnsm   | assays_ss_ctgr   | assays_cll_d   |   assays_ss_tx_d | assays_ss_sbclllr_frctn   | assays_crtd_b   | assays_ss_strn   |   assays_cnfdnc_scr |   assays_src_d | assays_src_ss_d   | assays_chmbl_d   | assays_b_frmt   | assays_vrnt_d   |
|--------------:|:----------------|--------------:|:---------------|:------------------|:-----------------|:---------------|-----------------:|:--------------------------|:----------------|:-----------------|--------------------:|---------------:|:------------------|:-----------------|:----------------|:----------------|
|          7524 | Kidney          |          9866 | 2113.0         | Rattus norvegicus |                  |                |            10116 |                           | Intermediate    |                  |                   1 |              1 |                   | CHEMBL618647     | BAO_0000218     |                 |
|          7525 | Kidney          |          9866 | 2113.0         | Rattus norvegicus |                  |                |            10116 |                           | Intermediate    |                  |                   1 |              1 |                   | CHEMBL618648     | BAO_0000218     |                 |
|          7526 | Kidney          |          9866 | 2113.0         | Rattus norvegicus |                  |                |            10116 |                           | Intermediate    |                  |                   1 |              1 |                   | CHEMBL618649     | BAO_0000218     |                 |
|          7527 | Liver           |          9866 | 2107.0         | Rattus norvegicus |                  |                |            10116 |                           | Intermediate    |                  |                   1 |              1 |                   | CHEMBL618650     | BAO_0000218     |                 |
|          7528 | Liver           |          9866 | 2107.0         | Rattus norvegicus |                  |                |            10116 |                           | Intermediate    |                  |                   1 |              1 |                   | CHEMBL618651     | BAO_0000218     |                 |
|          7529 | Liver           |          9866 | 2107.0         | Rattus norvegicus |                  |                |            10116 |                           | Intermediate    |                  |                   1 |              1 |                   | CHEMBL876497     | BAO_0000218     |                 |
|          7530 | Lung            |          9866 | 2048.0         | Rattus norvegicus |                  |                |            10116 |                           | Intermediate    |                  |                   1 |              1 |                   | CHEMBL618652     | BAO_0000218     |                 |
|          7531 | Lung            |          9866 | 2048.0         | Rattus norvegicus |                  |                |            10116 |                           | Intermediate    |                  |                   1 |              1 |                   | CHEMBL618653     | BAO_0000218     |                 |
|          7532 | Lung            |          9866 | 2048.0         | Rattus norvegicus |                  |                |            10116 |                           | Intermediate    |                  |                   1 |              1 |                   | CHEMBL618654     | BAO_0000218     |                 |
|          7533 |                 |          6351 |                | Rattus norvegicus |                  |                |            10116 |                           | Intermediate    |                  |                   1 |              1 |                   | CHEMBL618655     | BAO_0000218     |                 |



source_headers: assay_id
assay_tissue
doc_id
tissue_id
assay_organism
assay_category
cell_id
assay_tax_id
assay_subcellular_fraction
curated_by
assay_strain
target_headers: assays_ss_d
assays_ss_tss
assays_dc_d
assays_tss_d
assays_ss_rgnsm
assays_ss_ctgr
assays_cll_d
assays_ss_tx_d
assays_ss_sbclllr_frctn
assays_crtd_b
assays_ss_strn
column_mappings: assay_id
assays_ss_d
assay_tissue
assays_ss_tss
doc_id
assays_dc_d
tissue_id
assays_tss_d
assay_organism
assays_ss_rgnsm
assay_category
assays_ss_ctgr
cell_id
assays_cll_d
assay_tax_id
assays_ss_tx_d
assay_subcellular_fraction
assays_ss_sbclllr_frctn
curated_by
assays_crtd_b
assay_strain
assays_ss_strn
output: {"column_mappings": [["assay_id", "assays_ss_d"], ["assay_tissue", "assays_ss_tss"], ["doc_id", "assays_dc_d"], ["tissue_id", "assays_tss_d"], ["assay_organism", "assays_ss_rgnsm"], ["assay_category", "assays_ss_ctgr"], ["cell_id", "assays_cll_d"], ["assay_tax_id", "assays_ss_tx_d"], ["assay_subcellular_fraction", "assays_ss_sbclllr_frctn"], ["curated_by", "assays_crtd_b"], ["assay_strain", "assays_ss_strn"], ["description", null], ["assay_type", null], ["assay_test_type", null], ["assay_cell_type", null], ["tid", null], ["relationship_type", null]]}