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   | NumberChildren   | State              | Age   | Gender   | City          | LastName   | FirstName   | MiddleInitial   | AddressLine1         | AddressLine2   | PostalCode   | Country                  | Phone          |
|:-----------|:-----------------|:-------------------|:------|:---------|:--------------|:-----------|:------------|:----------------|:---------------------|:---------------|:-------------|:-------------------------|:---------------|
| PEL0       | 4.0              | MA                 | 12.0  | f        | Faifbanks     | PELLAND    | Netti       |                 | 21847 olympia street |                | T6b 1i1      | United States of America | 1-712-522-6088 |
| LED1       | 7.0              | PA                 | 4.0   | F        | Quebes        | LEDUC      | TRUDY       |                 | 245 congress court   | APT. 624       | 77281        | United States of America | 1-626-426-4298 |
| lat2       | 8.0              | Aoberta            |       |          | Hegderson     | latif      | ireland     |                 | 6517 frailing west   |                | 91355        | United States of America | 1-524-787-8784 |
| RUD3       | 4.0              | AR                 | 24.0  |          | Saoem         | RUDDICK    | Misti       |                 | 11449 blalock park   |                | 36615        | Canada                   | 1-741-997-1688 |
| JAY4       | 6.0              | OR                 | 18.0  | f        | Tolefo        | JAYAMANNE  | sarena      | M               | 18354 dodd court     | Apt. 619       | t6a 1i3      | Canada                   | 1-002-194-1991 |
| tod5       | 2.0              | VA                 | 55.0  | M        | CorousCyristi | todo       | Paulette    | Z               | 14117 roxboro street |                | A2b 1v3      | United States of America | 1-441-371-7651 |
| Kan6       | 1.0              | OH                 | 27.0  | m        | daltLakeCi5y  | Kanno      | AMALITA     | R               | 24697 FLORENCE WEST  |                | 49513        | Canada                   | 1-957-940-5980 |
| Din7       | 2.0              | PrunceEdward9slamd | 37.0  |          | Broanwville   | Dinkel     | Ernesto     | Z               | 6488 applewood drive |                | M5d 1v6      | United States of America | 1-768-633-4096 |
| Thi8       |                  | NV                 | 8.0   |          | Escojdido     | Thibodeaux | Toby        |                 | 17404 gale court     |                | V6c 1q1      | United States of America | 1-107-689-2155 |
| May9       | 3.0              | On5ario            | 150.0 |          | LocAngwles    | Mayo       | evangelia   |                 | 15913 alexis street  |                | 99716        | United States of America | 1-173-594-6096 |

TableB:
| prospect_gncd   | prospect_nmbrchldrn   | prospect_stt   |   prospect_g | prospect_gndr   | prospect_ct   |   prospect_ncm |   prospect_nmbrcrs | prospect_mrtlstts   |   prospect_crdtrtng | prospect_wnrrntflg   | prospect_mplr                  | prospect_nmbrcrdtcrds   |   prospect_ntwrth |
|:----------------|:----------------------|:---------------|-------------:|:----------------|:--------------|---------------:|-------------------:|:--------------------|--------------------:|:---------------------|:-------------------------------|:------------------------|------------------:|
| Iok7501         |                       | MO             |            7 |                 | Baltimore     |          94490 |                  3 | U                   |                 580 | U                    | FM Global                      |                         |  321776           |
| tia7502         | 4.0                   | TX             |           48 | M               | Kitchener     |           7037 |                  4 | S                   |                 683 | R                    | MGIC Investment                | 2.0                     |       2.29232e+06 |
| AOI7503         | 5.0                   | CT             |           14 |                 | Saint John    |         419269 |                  1 | M                   |                 411 | O                    | Ross Stores                    | 2.0                     |  969707           |
| PJQ7504         | 5.0                   | UT             |           29 | m               | Berkeley      |          76681 |                  4 | W                   |                 818 | U                    |                                | 9.0                     |       3.89946e+06 |
| SDV7505         | 4.0                   | RI             |           69 |                 | Missoula      |         209116 |                  2 | U                   |                 370 | R                    | Alliance One International     | 7.0                     |       3.74922e+06 |
| Hga7506         | 0.0                   | DE             |           47 | F               | Salinas       |         212203 |                  0 | U                   |                 833 | O                    | Sally Beauty Holdings          | 6.0                     |       3.65853e+06 |
| Beo7507         | 5.0                   | NM             |            0 | M               | San Jose      |          42018 |                  5 | M                   |                 536 | U                    | Wisconsin Energy               | 2.0                     |       1.73846e+06 |
| Qum7508         | 0.0                   | WV             |           46 |                 | Cleveland     |          90446 |                  0 | S                   |                 775 | R                    | Carpenter Technology           | 0.0                     |       3.3073e+06  |
| Hud7509         | 1.0                   | NH             |            6 |                 | Huntington    |          16274 |                  1 | M                   |                 765 | R                    | Liberty Mutual Insurance Group | 3.0                     |       1.81642e+06 |
| jba7510         | 2.0                   | WY             |           22 | m               | Paterson      |          22215 |                  5 | M                   |                 555 | O                    | Black & Decker                 | 6.0                     |       2.59925e+06 |



source_headers: AgencyID
NumberChildren
State
Age
Gender
City
target_headers: prospect_gncd
prospect_nmbrchldrn
prospect_stt
prospect_g
prospect_gndr
prospect_ct
column_mappings: AgencyID
prospect_gncd
NumberChildren
prospect_nmbrchldrn
State
prospect_stt
Age
prospect_g
Gender
prospect_gndr
City
prospect_ct
output: {"column_mappings": [["AgencyID", "prospect_gncd"], ["NumberChildren", "prospect_nmbrchldrn"], ["State", "prospect_stt"], ["Age", "prospect_g"], ["Gender", "prospect_gndr"], ["City", "prospect_ct"], ["LastName", null], ["FirstName", null], ["MiddleInitial", null], ["AddressLine1", null], ["AddressLine2", null], ["PostalCode", null], ["Country", null], ["Phone", null]]}