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   | Age   | Country               | Phone          |         NetWorth | MiddleInitial   | OwnOrRentFlag   | Employer             | NumberChildren   | NumberCreditCards   | City          | LastName   | FirstName   | Gender   | AddressLine1         | AddressLine2   |
|:-----------|:------|:----------------------|:---------------|-----------------:|:----------------|:----------------|:---------------------|:-----------------|:--------------------|:--------------|:-----------|:------------|:---------|:---------------------|:---------------|
| PEL0       | 8.0   | Unit4dStq5esofAjerica | 1 712 522 6088 | 425708           |                 | O               | Brimks               | 2.0              |                     | vairbanks     | PELLAND    | Netti       | f        | 21847 olympia street |                |
| LED1       | 4.0   | Uni5edShatdsofAmerifa | 1 626 426 4298 |      2.27968e+06 |                 | U               |                      | 2.0              | 6.0                 | Qkebec        | LEDUC      | TRUDY       | F        | 245 congress court   | APT. 624       |
| lat2       |       | UnotwdStat4sofAmfrica | 1 524 787 8784 | 227313           |                 | O               |                      | 4.0              | 4.0                 | Hendfrson     | latif      | ireland     |          | 6517 frailing west   |                |
| RUD3       | 17.0  | Canadz                | 1 741 997 1688 |      1.79113e+06 |                 | O               | AirPfoeuctdChemicais | 0.0              | 10.0                | Salsm         | RUDDICK    | Misti       |          | 11449 blalock park   |                |
| JAY4       | 40.0  | Canara                | 1 002 194 1991 |      1.99382e+06 | M               | O               | Oshkodh              | 4.0              | 8.0                 | T8ledo        | JAYAMANNE  | sarena      | f        | 18354 dodd court     | Apt. 619       |
| tod5       | 10.0  | UnitedStwyssofAmfrica | 1 441 371 7651 |      1.551e+06   | Z               | R               |                      | 2.0              | 6.0                 | ClrpusChris6i | todo       | Paulette    | M        | 14117 roxboro street |                |
| Kan6       | 0.0   | Cznada                | 1 957 940 5980 | 865914           | R               | O               | V4raSunEjergy        | 0.0              | 12.0                | SaitLakeCjty  | Kanno      | AMALITA     | m        | 24697 FLORENCE WEST  |                |
| Din7       | 16.0  | UnkredStatesoeAmerjca | 1 768 633 4096 |      2.65878e+06 | Z               | U               | IDT                  | 3.0              | 15.0                | Brownxviole   | Dinkel     | Ernesto     |          | 6488 applewood drive |                |
| Thi8       | 36.0  | Unitedeta4esofAmerisz | 1 107 689 2155 |      1.65678e+06 |                 | O               | AdamsR4sourcesEnwrtt |                  | 5.0                 | Escondieo     | Thibodeaux | Toby        |          | 17404 gale court     |                |
| May9       | 60.0  | ynltedStxtesofAmericq | 1 173 594 6096 |      1.12408e+06 |                 | O               | MhIvInvestment       | 3.0              |                     | posAmgeles    | Mayo       | evangelia   |          | 15913 alexis street  |                |

TableB:
| AgencyID   |   Age | Country                  | Phone          |         NetWorth | MiddleInitial   | OwnOrRentFlag   | Employer                       | NumberChildren   | NumberCreditCards   | City       | PostalCode   | State   |   Income |   NumberCars | MaritalStatus   |   CreditRating |
|:-----------|------:|:-------------------------|:---------------|-----------------:|:----------------|:----------------|:-------------------------------|:-----------------|:--------------------|:-----------|:-------------|:--------|---------:|-------------:|:----------------|---------------:|
| Iok7501    |     7 | United States of America | 1-637-119-9996 | 321776           | n               | U               | FM Global                      |                  |                     | Baltimore  | Guudshirvcu  | MO      |    94490 |            3 | U               |            580 |
| tia7502    |    48 | Canada                   | 1-560-405-0048 |      2.29232e+06 |                 | R               | MGIC Investment                | 4.0              | 2.0                 | Kitchener  | wyggjewbe    | TX      |     7037 |            4 | S               |            683 |
| AOI7503    |    14 |                          | 1-261-306-5079 | 969707           | u               | O               | Ross Stores                    | 5.0              | 2.0                 | Saint John | YMZRQICUTHT  | CT      |   419269 |            1 | M               |            411 |
| PJQ7504    |    29 | United States of America | 1-642-299-6655 |      3.89946e+06 |                 | U               |                                | 5.0              | 9.0                 | Berkeley   | Bcjuycmcen   | UT      |    76681 |            4 | W               |            818 |
| SDV7505    |    69 | United States of America |                |      3.74922e+06 |                 | R               | Alliance One International     | 4.0              | 7.0                 | Missoula   | Nujxguyehf   | RI      |   209116 |            2 | U               |            370 |
| Hga7506    |    47 |                          | 1-388-257-4273 |      3.65853e+06 | F               | O               | Sally Beauty Holdings          | 0.0              | 6.0                 | Salinas    | Neigswk      | DE      |   212203 |            0 | U               |            833 |
| Beo7507    |     0 | Canada                   |                |      1.73846e+06 | D               | U               | Wisconsin Energy               | 5.0              | 2.0                 | San Jose   | WNCEOQPLW    | NM      |    42018 |            5 | M               |            536 |
| Qum7508    |    46 | United States of America | 1-632-118-1891 |      3.3073e+06  |                 | R               | Carpenter Technology           | 0.0              | 0.0                 | Cleveland  | Cskdwtkf     | WV      |    90446 |            0 | S               |            775 |
| Hud7509    |     6 | United States of America | 1-853-806-4986 |      1.81642e+06 | v               | R               | Liberty Mutual Insurance Group | 1.0              | 3.0                 | Huntington | tcxswloetdt  | NH      |    16274 |            1 | M               |            765 |
| jba7510    |    22 | Canada                   | 1-220-687-2027 |      2.59925e+06 |                 | O               | Black & Decker                 | 2.0              | 6.0                 | Paterson   | Fkpemasoukih | WY      |    22215 |            5 | M               |            555 |



source_headers: AgencyID
Age
Country
Phone
NetWorth
MiddleInitial
OwnOrRentFlag
Employer
NumberChildren
NumberCreditCards
City
target_headers: AgencyID
Age
Country
Phone
NetWorth
MiddleInitial
OwnOrRentFlag
Employer
NumberChildren
NumberCreditCards
City
column_mappings: AgencyID
AgencyID
Age
Age
Country
Country
Phone
Phone
NetWorth
NetWorth
MiddleInitial
MiddleInitial
OwnOrRentFlag
OwnOrRentFlag
Employer
Employer
NumberChildren
NumberChildren
NumberCreditCards
NumberCreditCards
City
City
output: {"column_mappings": [["AgencyID", "AgencyID"], ["Age", "Age"], ["Country", "Country"], ["Phone", "Phone"], ["NetWorth", "NetWorth"], ["MiddleInitial", "MiddleInitial"], ["OwnOrRentFlag", "OwnOrRentFlag"], ["Employer", "Employer"], ["NumberChildren", "NumberChildren"], ["NumberCreditCards", "NumberCreditCards"], ["City", "City"], ["LastName", null], ["FirstName", null], ["Gender", null], ["AddressLine1", null], ["AddressLine2", null]]}