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   | MaritalStatus   | NumberChildren   | Age   | AddressLine2   |         NetWorth | LastName   | FirstName   | MiddleInitial   | Gender   | AddressLine1         | PostalCode   | City           | State                |
|:-----------|:----------------|:-----------------|:------|:---------------|-----------------:|:-----------|:------------|:----------------|:---------|:---------------------|:-------------|:---------------|:---------------------|
| PEL0       | W               | 3.0              | 20.0  |                |      1.05887e+06 | PELLAND    | Netti       |                 | f        | 21847 olympia street | T6b 1i1      | Fairbanks      | MA                   |
| LED1       | U               | 1.0              | 3.0   | APT. 624       |      1.98818e+06 | LEDUC      | TRUDY       |                 | F        | 245 congress court   | 77281        | Quebec         | PA                   |
| lat2       | S               | 1.0              |       |                |      3.67313e+06 | latif      | ireland     |                 |          | 6517 frailing west   | 91355        | Henderson      | Alberta              |
| RUD3       | W               | 1.0              | 77.0  |                |      2.0059e+06  | RUDDICK    | Misti       |                 |          | 11449 blalock park   | 36615        | Salem          | AR                   |
| JAY4       | M               | 3.0              | 21.0  | Apt. 619       | 624736           | JAYAMANNE  | sarena      | M               | f        | 18354 dodd court     | t6a 1i3      | Toledo         | OR                   |
| tod5       | M               | 4.0              | 77.0  |                |      3.06462e+06 | todo       | Paulette    | Z               | M        | 14117 roxboro street | A2b 1v3      | Corpus Christi | VA                   |
| Kan6       |                 | 0.0              | 23.0  |                |      3.48913e+06 | Kanno      | AMALITA     | R               | m        | 24697 FLORENCE WEST  | 49513        | Salt Lake City | OH                   |
| Din7       | M               | 2.0              | 9.0   |                |      3.43074e+06 | Dinkel     | Ernesto     | Z               |          | 6488 applewood drive | M5d 1v6      | Brownsville    | Prince Edward Island |
| Thi8       | U               |                  | 63.0  |                |      1.74361e+06 | Thibodeaux | Toby        |                 |          | 17404 gale court     | V6c 1q1      | Escondido      | NV                   |
| May9       | M               | 2.0              | 32.0  |                | 216299           | Mayo       | evangelia   |                 |          | 15913 alexis street  | 99716        | Los Angeles    | Ontario              |

TableB:
| gncd    | mrtlstts   | nmbrchldrn   |   g | ddrssln2                                                          |           ntwrth | cntr                     | phn            |    ncm |   nmbrcrs |   crdtrtng | wnrrntflg   | mplr                           | nmbrcrdtcrds   |
|:--------|:-----------|:-------------|----:|:------------------------------------------------------------------|-----------------:|:-------------------------|:---------------|-------:|----------:|-----------:|:------------|:-------------------------------|:---------------|
| Iok7501 | U          |              |   7 | GKOIKEZZMQTPQUQZLSAUUMVBDPAXTWNWSXTYJYQ                           | 321776           | United States of America | 1-637-119-9996 |  94490 |         3 |        580 | U           | FM Global                      |                |
| tia7502 | S          | 4.0          |  48 | ocmgcvnexhqhgoyrwpkgaopthdvandlzaaleqccjpjkbirtcqvorobgskhtlgndvn |      2.29232e+06 | Canada                   | 1-560-405-0048 |   7037 |         4 |        683 | R           | MGIC Investment                | 2.0            |
| AOI7503 | M          | 5.0          |  14 | Cdrxeolwrrxmwmhgexvcstvzz                                         | 969707           |                          | 1-261-306-5079 | 419269 |         1 |        411 | O           | Ross Stores                    | 2.0            |
| PJQ7504 | W          | 5.0          |  29 | WKSBVOFGJHQGAEKUYRZHHPH                                           |      3.89946e+06 | United States of America | 1-642-299-6655 |  76681 |         4 |        818 | U           |                                | 9.0            |
| SDV7505 | U          | 4.0          |  69 | skxijfqpzshmts                                                    |      3.74922e+06 | United States of America |                | 209116 |         2 |        370 | R           | Alliance One International     | 7.0            |
| Hga7506 | U          | 0.0          |  47 | ZETOHHRKIBHCQCKZODIXJJSXCFY                                       |      3.65853e+06 |                          | 1-388-257-4273 | 212203 |         0 |        833 | O           | Sally Beauty Holdings          | 6.0            |
| Beo7507 | M          | 5.0          |   0 | LJXAXKUJXQBGWBHJJAAM                                              |      1.73846e+06 | Canada                   |                |  42018 |         5 |        536 | U           | Wisconsin Energy               | 2.0            |
| Qum7508 | S          | 0.0          |  46 | Jmlgjkjbqhrudrkqrm                                                |      3.3073e+06  | United States of America | 1-632-118-1891 |  90446 |         0 |        775 | R           | Carpenter Technology           | 0.0            |
| Hud7509 | M          | 1.0          |   6 | Qqcilgblxyikgr                                                    |      1.81642e+06 | United States of America | 1-853-806-4986 |  16274 |         1 |        765 | R           | Liberty Mutual Insurance Group | 3.0            |
| jba7510 | M          | 2.0          |  22 | Ahtohqjfzfarn                                                     |      2.59925e+06 | Canada                   | 1-220-687-2027 |  22215 |         5 |        555 | O           | Black & Decker                 | 6.0            |



source_headers: AgencyID
MaritalStatus
NumberChildren
Age
AddressLine2
NetWorth
target_headers: gncd
mrtlstts
nmbrchldrn
g
ddrssln2
ntwrth
column_mappings: AgencyID
gncd
MaritalStatus
mrtlstts
NumberChildren
nmbrchldrn
Age
g
AddressLine2
ddrssln2
NetWorth
ntwrth
output: {"column_mappings": [["AgencyID", "gncd"], ["MaritalStatus", "mrtlstts"], ["NumberChildren", "nmbrchldrn"], ["Age", "g"], ["AddressLine2", "ddrssln2"], ["NetWorth", "ntwrth"], ["LastName", null], ["FirstName", null], ["MiddleInitial", null], ["Gender", null], ["AddressLine1", null], ["PostalCode", null], ["City", null], ["State", null]]}