Task: Schema-Matching (source dataset: DeepMDatasets)

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:
| id   | title                                                             | category                      | brand         | modelno    | price   |
|:-----|:------------------------------------------------------------------|:------------------------------|:--------------|:-----------|:--------|
| id   | title                                                             | category                      | brand         | modelno    | price   |
| 0    | draper infrared remote transmitter                                | electronics - general         | draper        | 121066     | 58.45   |
| 1    | epson 1500 hours 200w uhe projector lamp elplp12                  | monitors                      | epson         | elplp12    | 438.84  |
| 2    | comprehensive two-piece 75 precision bnc jack for rg-59 set of 25 | tv accessories                | comprehensive | bj-2c7559  | 59.25   |
| 3    | d-link dcs-1100 network camera                                    | garden - general              | d-link        | dcs-1100   | 99.82   |
| 4    | startech.com rkpw247015 24 outlet power strip                     | electronics - general         | startech      | rkpw247015 | 59.0    |
| 5    | 3m fr530cb ergonomic adjustable footrest                          | furniture                     | 3m            | fr530cb    | 67.88   |
| 6    | hp c6020b coated paper 1 roll 36-inches x 150 ft                  | stationery & office machinery | hp            | c6020b     | 49.88   |
| 7    | visioneer rw120-wu roadwarrior sheetfed scanner                   | electronics - general         | visioneer     | rw120-wu   | 199.98  |
| 8    | brother dk2113 ql label printers continuous length tape           | stationery & office machinery | brother       | dk2113     | 64.88   |

TableB:
|   id | title                                                                                                                | category              | brand      | modelno       |   price |
|-----:|:---------------------------------------------------------------------------------------------------------------------|:----------------------|:-----------|:--------------|--------:|
|    0 | koss eq50 3-band stereo equalizer                                                                                    | headphone accessories | koss       | 152132        |   12.65 |
|    1 | kodak black ink cartridge 10b 1163641                                                                                | inkjet printer ink    | kodak      | 1163641       |   10.28 |
|    2 | kingston 128mx64 pc2700 compaq evo d320 ktc-d320 1g                                                                  | computers accessories | kingston   | ktc-d320 / 1g |   33.75 |
|    3 | kinamax ms-ues2 mini high precision usb 3-button 3d optical scroll wheel mouse with retractable cable black          | mice                  | kinamax    | ms-ues2       |    6.99 |
|    4 | kensington k72349us wireless mouse for netbooks                                                                      | mice                  | kensington | k72349us      |   24    |
|    5 | kensington blackbelt protection band for ipad 2 k39324us                                                             | cases sleeves         | kensington | k39324us      |   23.92 |
|    6 | just5 j509 easy to use unlocked cell phone with big buttons amplified sound personal emergency response system black | unlocked phones       | just5      | j509black     |   64.11 |
|    7 | imation corp 50pk cdr 700mb 80min 52x-spindle 17301                                                                  | cd-r discs            | imation    | 17301         |   10.29 |
|    8 | 16x dvd-r media                                                                                                      | dvd-r discs           | imation    | 17340         |    6.99 |
|    9 | igo arctic laptop cooling pad ac05065-0001                                                                           | cleaning repair       | igo        | ac05065-0001  |   29.99 |



source_headers: id
title
category
brand
modelno
price
target_headers: id
title
category
brand
modelno
price
column_mappings: id
id
title
title
category
category
brand
brand
modelno
modelno
price
price
output: {"column_mappings": [["id", "id"], ["title", "title"], ["category", "category"], ["brand", "brand"], ["modelno", "modelno"], ["price", "price"]]}