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

TableB:
|   assays_ASI | assays_ASCA   | assays_ASTIS   | assays_VAI   | assays_ASSOR   | assays_CHI   |   assays_DI | assays_ASSTR   |   assays_Ti | assays_CURAB   | assays_ASSTAI   |   assays_CONFISCO |   assays_SRI | assays_SRASI   | assays_CEI   | assays_BAFOR   | assays_TII   |
|-------------:|:--------------|:---------------|:-------------|:---------------|:-------------|------------:|:---------------|------------:|:---------------|:----------------|------------------:|-------------:|:---------------|:-------------|:---------------|:-------------|
|            1 |               |                |              |                | CHEMBL615117 |       11087 |                |       12052 | Autocuration   |                 |                 8 |            1 |                |              | BAO_0000019    |              |
|            2 |               |                |              |                | CHEMBL615118 |         684 |                |       22226 | Autocuration   |                 |                 0 |            1 |                |              | BAO_0000219    |              |
|            3 |               |                |              |                | CHEMBL615119 |       15453 |                |       22226 | Autocuration   |                 |                 0 |            1 |                |              | BAO_0000019    |              |
|            4 |               |                |              | Bos taurus     | CHEMBL615120 |       17841 |                |      104729 | Autocuration   | 9913.0          |                 4 |            1 |                |              | BAO_0000249    |              |
|            5 |               |                |              | Homo sapiens   | CHEMBL615121 |       17430 |                |       80001 | Intermediate   | 9606.0          |                 1 |            1 |                | 163.0        | BAO_0000219    |              |
|            6 |               |                |              | Homo sapiens   | CHEMBL615122 |       17430 |                |       80001 | Intermediate   | 9606.0          |                 1 |            1 |                | 163.0        | BAO_0000219    |              |
|            7 |               |                |              | Mus musculus   | CHEMBL615123 |       13799 |                |       80001 | Intermediate   | 10090.0         |                 1 |            1 |                | 163.0        | BAO_0000219    |              |
|            8 |               |                |              | Homo sapiens   | CHEMBL615124 |       17774 |                |       80001 | Expert         | 9606.0          |                 1 |            1 |                | 163.0        | BAO_0000219    |              |
|            9 |               |                |              | Homo sapiens   | CHEMBL615125 |        3801 |                |       80001 | Intermediate   | 9606.0          |                 1 |            1 |                | 163.0        | BAO_0000219    |              |
|           10 |               |                |              | Homo sapiens   | CHEMBL615126 |       17430 |                |       80001 | Intermediate   | 9606.0          |                 1 |            1 |                | 163.0        | BAO_0000219    |              |



source_headers: assay_id
assay_category
assay_tissue
variant_id
assay_organism
chembl_id
doc_id
assay_strain
tid
curated_by
assay_tax_id
target_headers: assays_ASI
assays_ASCA
assays_ASTIS
assays_VAI
assays_ASSOR
assays_CHI
assays_DI
assays_ASSTR
assays_Ti
assays_CURAB
assays_ASSTAI
column_mappings: assay_id
assays_ASI
assay_category
assays_ASCA
assay_tissue
assays_ASTIS
variant_id
assays_VAI
assay_organism
assays_ASSOR
chembl_id
assays_CHI
doc_id
assays_DI
assay_strain
assays_ASSTR
tid
assays_Ti
curated_by
assays_CURAB
assay_tax_id
assays_ASSTAI
output: {"column_mappings": [["assay_id", "assays_ASI"], ["assay_category", "assays_ASCA"], ["assay_tissue", "assays_ASTIS"], ["variant_id", "assays_VAI"], ["assay_organism", "assays_ASSOR"], ["chembl_id", "assays_CHI"], ["doc_id", "assays_DI"], ["assay_strain", "assays_ASSTR"], ["tid", "assays_Ti"], ["curated_by", "assays_CURAB"], ["assay_tax_id", "assays_ASSTAI"], ["description", null], ["assay_type", null], ["assay_test_type", null], ["assay_cell_type", null], ["assay_subcellular_fraction", null], ["relationship_type", null]]}