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   | OwnOrRentFlag   | FirstName   | MaritalStatus   | PostalCode   |         NetWorth | LastName   | MiddleInitial   | Gender   | AddressLine1         | AddressLine2   | City           | State                | Country                  |
|:-----------|:----------------|:------------|:----------------|:-------------|-----------------:|:-----------|:----------------|:---------|:---------------------|:---------------|:---------------|:---------------------|:-------------------------|
| PEL0       | O               | Netti       | W               | T6b 1i1      |      1.05887e+06 | PELLAND    |                 | f        | 21847 olympia street |                | Fairbanks      | MA                   | United States of America |
| LED1       | U               | TRUDY       | U               | 77281        |      1.98818e+06 | LEDUC      |                 | F        | 245 congress court   | APT. 624       | Quebec         | PA                   | United States of America |
| lat2       | O               | ireland     | S               | 91355        |      3.67313e+06 | latif      |                 |          | 6517 frailing west   |                | Henderson      | Alberta              | United States of America |
| RUD3       | O               | Misti       | W               | 36615        |      2.0059e+06  | RUDDICK    |                 |          | 11449 blalock park   |                | Salem          | AR                   | Canada                   |
| JAY4       | O               | sarena      | M               | t6a 1i3      | 624736           | JAYAMANNE  | M               | f        | 18354 dodd court     | Apt. 619       | Toledo         | OR                   | Canada                   |
| tod5       | R               | Paulette    | M               | A2b 1v3      |      3.06462e+06 | todo       | Z               | M        | 14117 roxboro street |                | Corpus Christi | VA                   | United States of America |
| Kan6       | O               | AMALITA     |                 | 49513        |      3.48913e+06 | Kanno      | R               | m        | 24697 FLORENCE WEST  |                | Salt Lake City | OH                   | Canada                   |
| Din7       | U               | Ernesto     | M               | M5d 1v6      |      3.43074e+06 | Dinkel     | Z               |          | 6488 applewood drive |                | Brownsville    | Prince Edward Island | United States of America |
| Thi8       | O               | Toby        | U               | V6c 1q1      |      1.74361e+06 | Thibodeaux |                 |          | 17404 gale court     |                | Escondido      | NV                   | United States of America |
| May9       | O               | evangelia   | M               | 99716        | 216299           | Mayo       |                 |          | 15913 alexis street  |                | Los Angeles    | Ontario              | United States of America |

TableB:
| gncd    | wnrrntflg   | frstnm                      | mrtlstts   | pstlcd       |           ntwrth | phn            |    ncm |   nmbrcrs | nmbrchldrn   |   g |   crdtrtng | mplr                           | nmbrcrdtcrds   |
|:--------|:------------|:----------------------------|:-----------|:-------------|-----------------:|:---------------|-------:|----------:|:-------------|----:|-----------:|:-------------------------------|:---------------|
| Iok7501 | U           | wbwsqgtaa                   | U          | Guudshirvcu  | 321776           | 1-637-119-9996 |  94490 |         3 |              |   7 |        580 | FM Global                      |                |
| tia7502 | R           | QGJWCPAPZMWHYHZTNOYSSOQBI   | S          | wyggjewbe    |      2.29232e+06 | 1-560-405-0048 |   7037 |         4 | 4.0          |  48 |        683 | MGIC Investment                | 2.0            |
| AOI7503 | O           | BHGXDDPUMBESLQMNEPREPTZNNKM | M          | YMZRQICUTHT  | 969707           | 1-261-306-5079 | 419269 |         1 | 5.0          |  14 |        411 | Ross Stores                    | 2.0            |
| PJQ7504 | U           | Xgnvppcxgfnmawlupgfa        | W          | Bcjuycmcen   |      3.89946e+06 | 1-642-299-6655 |  76681 |         4 | 5.0          |  29 |        818 |                                | 9.0            |
| SDV7505 | R           | Tfiozpstcftslqtwkgngiiwo    | U          | Nujxguyehf   |      3.74922e+06 |                | 209116 |         2 | 4.0          |  69 |        370 | Alliance One International     | 7.0            |
| Hga7506 | O           | fbcahlrhhjoslfzqvvwwvhk     | U          | Neigswk      |      3.65853e+06 | 1-388-257-4273 | 212203 |         0 | 0.0          |  47 |        833 | Sally Beauty Holdings          | 6.0            |
| Beo7507 | U           | Dcgkohfcwyoaxckalqnkrzwq    | M          | WNCEOQPLW    |      1.73846e+06 |                |  42018 |         5 | 5.0          |   0 |        536 | Wisconsin Energy               | 2.0            |
| Qum7508 | R           | Vmnmcsinflxxmmifydckncc     | S          | Cskdwtkf     |      3.3073e+06  | 1-632-118-1891 |  90446 |         0 | 0.0          |  46 |        775 | Carpenter Technology           | 0.0            |
| Hud7509 | R           | Vrkbkkxkddtximspigmlbwzt    | M          | tcxswloetdt  |      1.81642e+06 | 1-853-806-4986 |  16274 |         1 | 1.0          |   6 |        765 | Liberty Mutual Insurance Group | 3.0            |
| jba7510 | O           | RMWCTFTLSVTMCBI             | M          | Fkpemasoukih |      2.59925e+06 | 1-220-687-2027 |  22215 |         5 | 2.0          |  22 |        555 | Black & Decker                 | 6.0            |



source_headers: AgencyID
OwnOrRentFlag
FirstName
MaritalStatus
PostalCode
NetWorth
target_headers: gncd
wnrrntflg
frstnm
mrtlstts
pstlcd
ntwrth
column_mappings: AgencyID
gncd
OwnOrRentFlag
wnrrntflg
FirstName
frstnm
MaritalStatus
mrtlstts
PostalCode
pstlcd
NetWorth
ntwrth
output: {"column_mappings": [["AgencyID", "gncd"], ["OwnOrRentFlag", "wnrrntflg"], ["FirstName", "frstnm"], ["MaritalStatus", "mrtlstts"], ["PostalCode", "pstlcd"], ["NetWorth", "ntwrth"], ["LastName", null], ["MiddleInitial", null], ["Gender", null], ["AddressLine1", null], ["AddressLine2", null], ["City", null], ["State", null], ["Country", null]]}