Task: Schema-Matching (source dataset: prospect)

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:
| AgencyID   | City          | AddressLine2   | CreditRating   | OwnOrRentFlag   |   Income | FirstName   | NumberChildren   |         NetWorth | MiddleInitial   | Employer             | LastName   | Gender   | AddressLine1         | PostalCode   | State                |
|:-----------|:--------------|:---------------|:---------------|:----------------|---------:|:------------|:-----------------|-----------------:|:----------------|:---------------------|:-----------|:---------|:---------------------|:-------------|:---------------------|
| PEL0       | Fairvanks     |                | 246.0          | O               |   201146 | getti       | 1.0              | 907973           |                 | Brinjs               | PELLAND    | f        | 21847 olympia street | T6b 1i1      | MA                   |
| LED1       | auebec        | AoT624         | 577.0          | U               |   382190 | TRUDj       | 2.0              |      1.62424e+06 |                 |                      | LEDUC      | F        | 245 congress court   | 77281        | PA                   |
| lat2       | Hegderson     |                | 397.0          | O               |   174685 | irelwnd     | 2.0              | 763995           |                 |                      | latif      |          | 6517 frailing west   | 91355        | Alberta              |
| RUD3       | Salwm         |                |                | O               |   249596 | Mis5i       | 1.0              |      1.86238e+06 |                 | AirProd7cysChemiczos | RUDDICK    |          | 11449 blalock park   | 36615        | AR                   |
| JAY4       | Tooedo        | qpt619         | 516.0          | O               |   702487 | warena      | 2.0              |      2.35418e+06 | M               | Oshkpsh              | JAYAMANNE  | f        | 18354 dodd court     | t6a 1i3      | OR                   |
| tod5       | CorouqChristi |                | 371.0          | R               |   684262 | Paul4tte    | 2.0              | 555400           | Z               |                      | todo       | M        | 14117 roxboro street | A2b 1v3      | VA                   |
| Kan6       | Sal6LajeCity  |                | 603.0          | O               |   159101 | AMALIgA     | 2.0              |      1.08831e+06 | R               | VeraSunEnethy        | Kanno      | m        | 24697 FLORENCE WEST  | 49513        | OH                   |
| Din7       | Brpwnsviple   |                | 455.0          | U               |   364666 | Ernwsto     | 1.0              |      2.02794e+06 | Z               | IDT                  | Dinkel     |          | 6488 applewood drive | M5d 1v6      | Prince Edward Island |
| Thi8       | dscondido     |                | 580.0          | O               |   441281 | Toby        |                  | 483736           |                 | AdamsReeougcesEnwrgg | Thibodeaux |          | 17404 gale court     | V6c 1q1      | NV                   |
| May9       | LosAjgekes    |                | 299.0          | O               |   222268 | evangeliz   | 0.0              |      2.48706e+06 |                 | hGICInvestmemt       | Mayo       |          | 15913 alexis street  | 99716        | Ontario              |

TableB:
| prospect_gncd   | prospect_ct   | prospect_ddrssln2                                                 |   prospect_crdtrtng | prospect_wnrrntflg   |   prospect_ncm | prospect_frstnm             | prospect_nmbrchldrn   |   prospect_ntwrth | prospect_mddlntl   | prospect_mplr                  | prospect_cntr            | prospect_phn   |   prospect_nmbrcrs | prospect_mrtlstts   |   prospect_g | prospect_nmbrcrdtcrds   |
|:----------------|:--------------|:------------------------------------------------------------------|--------------------:|:---------------------|---------------:|:----------------------------|:----------------------|------------------:|:-------------------|:-------------------------------|:-------------------------|:---------------|-------------------:|:--------------------|-------------:|:------------------------|
| Iok7501         | Baltimore     | GKOIKEZZMQTPQUQZLSAUUMVBDPAXTWNWSXTYJYQ                           |                 580 | U                    |          94490 | wbwsqgtaa                   |                       |  321776           | n                  | FM Global                      | United States of America | 1-637-119-9996 |                  3 | U                   |            7 |                         |
| tia7502         | Kitchener     | ocmgcvnexhqhgoyrwpkgaopthdvandlzaaleqccjpjkbirtcqvorobgskhtlgndvn |                 683 | R                    |           7037 | QGJWCPAPZMWHYHZTNOYSSOQBI   | 4.0                   |       2.29232e+06 |                    | MGIC Investment                | Canada                   | 1-560-405-0048 |                  4 | S                   |           48 | 2.0                     |
| AOI7503         | Saint John    | Cdrxeolwrrxmwmhgexvcstvzz                                         |                 411 | O                    |         419269 | BHGXDDPUMBESLQMNEPREPTZNNKM | 5.0                   |  969707           | u                  | Ross Stores                    |                          | 1-261-306-5079 |                  1 | M                   |           14 | 2.0                     |
| PJQ7504         | Berkeley      | WKSBVOFGJHQGAEKUYRZHHPH                                           |                 818 | U                    |          76681 | Xgnvppcxgfnmawlupgfa        | 5.0                   |       3.89946e+06 |                    |                                | United States of America | 1-642-299-6655 |                  4 | W                   |           29 | 9.0                     |
| SDV7505         | Missoula      | skxijfqpzshmts                                                    |                 370 | R                    |         209116 | Tfiozpstcftslqtwkgngiiwo    | 4.0                   |       3.74922e+06 |                    | Alliance One International     | United States of America |                |                  2 | U                   |           69 | 7.0                     |
| Hga7506         | Salinas       | ZETOHHRKIBHCQCKZODIXJJSXCFY                                       |                 833 | O                    |         212203 | fbcahlrhhjoslfzqvvwwvhk     | 0.0                   |       3.65853e+06 | F                  | Sally Beauty Holdings          |                          | 1-388-257-4273 |                  0 | U                   |           47 | 6.0                     |
| Beo7507         | San Jose      | LJXAXKUJXQBGWBHJJAAM                                              |                 536 | U                    |          42018 | Dcgkohfcwyoaxckalqnkrzwq    | 5.0                   |       1.73846e+06 | D                  | Wisconsin Energy               | Canada                   |                |                  5 | M                   |            0 | 2.0                     |
| Qum7508         | Cleveland     | Jmlgjkjbqhrudrkqrm                                                |                 775 | R                    |          90446 | Vmnmcsinflxxmmifydckncc     | 0.0                   |       3.3073e+06  |                    | Carpenter Technology           | United States of America | 1-632-118-1891 |                  0 | S                   |           46 | 0.0                     |
| Hud7509         | Huntington    | Qqcilgblxyikgr                                                    |                 765 | R                    |          16274 | Vrkbkkxkddtximspigmlbwzt    | 1.0                   |       1.81642e+06 | v                  | Liberty Mutual Insurance Group | United States of America | 1-853-806-4986 |                  1 | M                   |            6 | 3.0                     |
| jba7510         | Paterson      | Ahtohqjfzfarn                                                     |                 555 | O                    |          22215 | RMWCTFTLSVTMCBI             | 2.0                   |       2.59925e+06 |                    | Black & Decker                 | Canada                   | 1-220-687-2027 |                  5 | M                   |           22 | 6.0                     |



source_headers: AgencyID
City
AddressLine2
CreditRating
OwnOrRentFlag
Income
FirstName
NumberChildren
NetWorth
MiddleInitial
Employer
target_headers: prospect_gncd
prospect_ct
prospect_ddrssln2
prospect_crdtrtng
prospect_wnrrntflg
prospect_ncm
prospect_frstnm
prospect_nmbrchldrn
prospect_ntwrth
prospect_mddlntl
prospect_mplr
column_mappings: AgencyID
prospect_gncd
City
prospect_ct
AddressLine2
prospect_ddrssln2
CreditRating
prospect_crdtrtng
OwnOrRentFlag
prospect_wnrrntflg
Income
prospect_ncm
FirstName
prospect_frstnm
NumberChildren
prospect_nmbrchldrn
NetWorth
prospect_ntwrth
MiddleInitial
prospect_mddlntl
Employer
prospect_mplr
output: {"column_mappings": [["AgencyID", "prospect_gncd"], ["City", "prospect_ct"], ["AddressLine2", "prospect_ddrssln2"], ["CreditRating", "prospect_crdtrtng"], ["OwnOrRentFlag", "prospect_wnrrntflg"], ["Income", "prospect_ncm"], ["FirstName", "prospect_frstnm"], ["NumberChildren", "prospect_nmbrchldrn"], ["NetWorth", "prospect_ntwrth"], ["MiddleInitial", "prospect_mddlntl"], ["Employer", "prospect_mplr"], ["LastName", null], ["Gender", null], ["AddressLine1", null], ["PostalCode", null], ["State", null]]}