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 | variant_id   | assay_tissue   | src_assay_id   |   src_id | relationship_type   |    tid | tissue_id   | description                                                                                 |   confidence_score | chembl_id    | assay_organism   | assay_subcellular_fraction   | assay_type   | assay_tax_id   | assay_test_type   |   doc_id | assay_category   | assay_strain   |
|-----------:|:-------------|:---------------|:---------------|---------:|:--------------------|-------:|:------------|:--------------------------------------------------------------------------------------------|-------------------:|:-------------|:-----------------|:-----------------------------|:-------------|:---------------|:------------------|---------:|:-----------------|:---------------|
|          1 |              |                |                |        1 | H                   |  12052 |             | Thecompounvwaxteaterfortheinvltfoibhibjtionofplatelet1qlipiaynenaseatafpmcdntrwtionof30uM   |                  8 | CHEMBL61t116 |                  |                              | B            |                |                   |    11087 |                  |                |
|          2 |              |                |                |        1 | U                   |  22226 |             | Comp8ymdwzssvapuatedforitsqbilitytomobilizedalciumim2321Nkcellw                             |                  0 | CmEMBL61r118 |                  |                              | F            |                |                   |      684 |                  |                |
|          3 |              |                |                |        1 | U                   |  22226 |             |                                                                                             |                  0 | CHEMvp615119 |                  |                              | B            |                |                   |    15453 |                  |                |
|          4 |              |                |                |        1 | H                   | 104729 |             | Bindihgaffinjtyabaunstz2adeb8sinerecep4orkmbovin3a4riatalmembrsnesuzjng3HCGS21680           |                  4 | CHEMBo615220 | nostaurus        |                              | B            | 52866.0        |                   |    17841 |                  |                |
|          5 |              |                |                |        1 | N                   |  80001 |             | Invlyrocellcutotoxicitysgainq6243BcelllinewHumanost4ozafconacelllkne                        |                  1 | CHEhBL61512w | bomosspiens      |                              | F            | 18689.0        |                   |    17430 |                  |                |
|          6 |              |                |                |        1 | N                   |  80001 |             | Imvitrocellcytotoxici5ywgainst1e3fcellluneebumabosteosagdomacellljnf                        |                  1 | CHrMBL625122 | nomisapiens      |                              | F            | 11900.0        |                   |    17430 |                  |                |
|          7 |              |                |                |        1 | N                   |  80001 |             | C6yotoxivActivitywacecalusy2cagainst143BTKtumorxells                                        |                  1 | vHEkBL615123 | Muxmudculus      |                              | F            | 39677.0        |                   |    13799 |                  |                |
|          8 |              |                |                |        1 | N                   |  80001 |             | Invitrocelocytoy9cicltywasdetedmjnefsgaigst143Bcelpline                                     |                  1 | CyrMBL615124 | Homosapisbs      |                              | F            | 7023.0         |                   |    17774 |                  |                |
|          9 |              |                |                |        1 | N                   |  80001 |             | Inhlblroryadtuvohjagaimsttumorosreisarcomacellpinf143Batter72yrcogtinuousfxposuretockmpound |                  1 | CHEMBL61r1q5 | H0moswpiens      |                              | F            | 44424.0        |                   |     3801 |                  |                |
|         10 |              |                |                |        1 | N                   |  80001 |             | Ingotrocellcytofoxicitysgaunst143gLTKcfllljnes2cpressedinHzV1Tj                             |                  1 | CHEMgL61t126 | jomosapienz      |                              | F            | 71081.0        |                   |    17430 |                  |                |

TableB:
|   assays_assay_id | assays_variant_id   | assays_assay_tissue   | assays_src_assay_id   |   assays_src_id | assays_relationship_type   |   assays_tid | assays_tissue_id   | assays_description                                                                                       |   assays_confidence_score | assays_chembl_id   | assays_assay_organism   | assays_assay_subcellular_fraction   | assays_assay_type   |   assays_assay_tax_id | assays_assay_test_type   | assays_assay_cell_type   | assays_curated_by   | assays_cell_id   | assays_bao_format   |
|------------------:|:--------------------|:----------------------|:----------------------|----------------:|:---------------------------|-------------:|:-------------------|:---------------------------------------------------------------------------------------------------------|--------------------------:|:-------------------|:------------------------|:------------------------------------|:--------------------|----------------------:|:-------------------------|:-------------------------|:--------------------|:-----------------|:--------------------|
|              7524 |                     | Kidney                |                       |               1 | N                          |        50597 | 2113.0             | Biodistribution in normal rat kidney in the presence of 0.005 M Gd/0.01 M lig at 2 hr                    |                         1 | CHEMBL618647       | Rattus norvegicus       |                                     | A                   |                 10116 | In vivo                  |                          | Intermediate        |                  | BAO_0000218         |
|              7525 |                     | Kidney                |                       |               1 | N                          |        50597 | 2113.0             | Biodistribution in normal rat kidney in the presence of 0.01 M Gd/0.05 M lig                             |                         1 | CHEMBL618648       | Rattus norvegicus       |                                     | A                   |                 10116 | In vivo                  |                          | Intermediate        |                  | BAO_0000218         |
|              7526 |                     | Kidney                |                       |               1 | N                          |        50597 | 2113.0             | Biodistribution in normal rat kidney in the presence of NAC Gd 0.01 M lig at 2 hr                        |                         1 | CHEMBL618649       | Rattus norvegicus       |                                     | A                   |                 10116 | In vivo                  |                          | Intermediate        |                  | BAO_0000218         |
|              7527 |                     | Liver                 |                       |               1 | N                          |        50597 | 2107.0             | Biodistribution in normal rat liver in the presence of 0.005 M Gd/0.01 M lig at 2 hr                     |                         1 | CHEMBL618650       | Rattus norvegicus       |                                     | A                   |                 10116 | In vivo                  |                          | Intermediate        |                  | BAO_0000218         |
|              7528 |                     | Liver                 |                       |               1 | N                          |        50597 | 2107.0             | Biodistribution in normal rat liver in the presence of 0.01 M Gd/0.05 M lig                              |                         1 | CHEMBL618651       | Rattus norvegicus       |                                     | A                   |                 10116 | In vivo                  |                          | Intermediate        |                  | BAO_0000218         |
|              7529 |                     | Liver                 |                       |               1 | N                          |        50597 | 2107.0             | Biodistribution in normal rat liver in the presence of NAC Gd 0.01 M lig at 2 hr                         |                         1 | CHEMBL876497       | Rattus norvegicus       |                                     | A                   |                 10116 | In vivo                  |                          | Intermediate        |                  | BAO_0000218         |
|              7530 |                     | Lung                  |                       |               1 | N                          |        50597 | 2048.0             | Biodistribution in normal rat lung in the presence of 0.005 M Gd/0.01 M lig at 2 hr                      |                         1 | CHEMBL618652       | Rattus norvegicus       |                                     | A                   |                 10116 | In vivo                  |                          | Intermediate        |                  | BAO_0000218         |
|              7531 |                     | Lung                  |                       |               1 | N                          |        50597 | 2048.0             | Biodistribution in normal rat lung in the presence of 0.01 M Gd/0.05 M lig                               |                         1 | CHEMBL618653       | Rattus norvegicus       |                                     | A                   |                 10116 | In vivo                  |                          | Intermediate        |                  | BAO_0000218         |
|              7532 |                     | Lung                  |                       |               1 | N                          |        50597 | 2048.0             | Biodistribution in normal rat lung in the presence of NAC Gd 0.01 M lig at 2 hr                          |                         1 | CHEMBL618654       | Rattus norvegicus       |                                     | A                   |                 10116 | In vivo                  |                          | Intermediate        |                  | BAO_0000218         |
|              7533 |                     |                       |                       |               1 | N                          |        50597 |                    | Recovery rate from urine and bile was determined after iv administration at 20 mg/kg in rats; Not tested |                         1 | CHEMBL618655       | Rattus norvegicus       |                                     | A                   |                 10116 |                          |                          | Intermediate        |                  | BAO_0000218         |



source_headers: assay_id
variant_id
assay_tissue
src_assay_id
src_id
relationship_type
tid
tissue_id
description
confidence_score
chembl_id
assay_organism
assay_subcellular_fraction
assay_type
assay_tax_id
assay_test_type
target_headers: assays_assay_id
assays_variant_id
assays_assay_tissue
assays_src_assay_id
assays_src_id
assays_relationship_type
assays_tid
assays_tissue_id
assays_description
assays_confidence_score
assays_chembl_id
assays_assay_organism
assays_assay_subcellular_fraction
assays_assay_type
assays_assay_tax_id
assays_assay_test_type
column_mappings: assay_id
assays_assay_id
variant_id
assays_variant_id
assay_tissue
assays_assay_tissue
src_assay_id
assays_src_assay_id
src_id
assays_src_id
relationship_type
assays_relationship_type
tid
assays_tid
tissue_id
assays_tissue_id
description
assays_description
confidence_score
assays_confidence_score
chembl_id
assays_chembl_id
assay_organism
assays_assay_organism
assay_subcellular_fraction
assays_assay_subcellular_fraction
assay_type
assays_assay_type
assay_tax_id
assays_assay_tax_id
assay_test_type
assays_assay_test_type
output: {"column_mappings": [["assay_id", "assays_assay_id"], ["variant_id", "assays_variant_id"], ["assay_tissue", "assays_assay_tissue"], ["src_assay_id", "assays_src_assay_id"], ["src_id", "assays_src_id"], ["relationship_type", "assays_relationship_type"], ["tid", "assays_tid"], ["tissue_id", "assays_tissue_id"], ["description", "assays_description"], ["confidence_score", "assays_confidence_score"], ["chembl_id", "assays_chembl_id"], ["assay_organism", "assays_assay_organism"], ["assay_subcellular_fraction", "assays_assay_subcellular_fraction"], ["assay_type", "assays_assay_type"], ["assay_tax_id", "assays_assay_tax_id"], ["assay_test_type", "assays_assay_test_type"], ["doc_id", null], ["assay_category", null], ["assay_strain", null]]}