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   | Country                  | City           | Age   | State                |         NetWorth | NumberCreditCards   | Employer                 |   Income | Phone          | OwnOrRentFlag   | LastName   | FirstName   | MiddleInitial   | Gender   | AddressLine1         |
|:-----------|:-------------------------|:---------------|:------|:---------------------|-----------------:|:--------------------|:-------------------------|---------:|:---------------|:----------------|:-----------|:------------|:----------------|:---------|:---------------------|
| PEL0       | United States of America | Fairbanks      | 20.0  | MA                   |      1.05887e+06 |                     | Brink's                  |   368776 | 1-712-522-6088 | O               | PELLAND    | Netti       |                 | f        | 21847 olympia street |
| LED1       | United States of America | Quebec         | 3.0   | PA                   |      1.98818e+06 | 6.0                 |                          |   177967 | 1-626-426-4298 | U               | LEDUC      | TRUDY       |                 | F        | 245 congress court   |
| lat2       | United States of America | Henderson      |       | Alberta              |      3.67313e+06 | 6.0                 |                          |   321772 | 1-524-787-8784 | O               | latif      | ireland     |                 |          | 6517 frailing west   |
| RUD3       | Canada                   | Salem          | 77.0  | AR                   |      2.0059e+06  | 3.0                 | Air Products & Chemicals |    25449 | 1-741-997-1688 | O               | RUDDICK    | Misti       |                 |          | 11449 blalock park   |
| JAY4       | Canada                   | Toledo         | 21.0  | OR                   | 624736           | 4.0                 | Oshkosh                  |   166567 | 1-002-194-1991 | O               | JAYAMANNE  | sarena      | M               | f        | 18354 dodd court     |
| tod5       | United States of America | Corpus Christi | 77.0  | VA                   |      3.06462e+06 | 10.0                |                          |    43631 | 1-441-371-7651 | R               | todo       | Paulette    | Z               | M        | 14117 roxboro street |
| Kan6       | Canada                   | Salt Lake City | 23.0  | OH                   |      3.48913e+06 | 1.0                 | VeraSun Energy           |   466230 | 1-957-940-5980 | O               | Kanno      | AMALITA     | R               | m        | 24697 FLORENCE WEST  |
| Din7       | United States of America | Brownsville    | 9.0   | Prince Edward Island |      3.43074e+06 | 7.0                 | IDT                      |   420243 | 1-768-633-4096 | U               | Dinkel     | Ernesto     | Z               |          | 6488 applewood drive |
| Thi8       | United States of America | Escondido      | 63.0  | NV                   |      1.74361e+06 | 10.0                | Adams Resources & Energy |   141862 | 1-107-689-2155 | O               | Thibodeaux | Toby        |                 |          | 17404 gale court     |
| May9       | United States of America | Los Angeles    | 32.0  | Ontario              | 216299           |                     | MGIC Investment          |   402011 | 1-173-594-6096 | O               | Mayo       | evangelia   |                 |          | 15913 alexis street  |

TableB:
| prospect_AgeID   | prospect_Co              | prospect_C   |   prospect_Ag | prospect_St   |   prospect_NeWor | prospect_NumCreCar   | prospect_Em                    |   prospect_In | prospect_Ph    | prospect_OwORF   | prospect_AddrL2                                                   | prospect_PoC   |   prospect_NuCa | prospect_NuChi   | prospect_MaSta   |   prospect_CrRat |
|:-----------------|:-------------------------|:-------------|--------------:|:--------------|-----------------:|:---------------------|:-------------------------------|--------------:|:---------------|:-----------------|:------------------------------------------------------------------|:---------------|----------------:|:-----------------|:-----------------|-----------------:|
| Iok7501          | United States of America | Baltimore    |             7 | MO            | 321776           |                      | FM Global                      |         94490 | 1-637-119-9996 | U                | GKOIKEZZMQTPQUQZLSAUUMVBDPAXTWNWSXTYJYQ                           | Guudshirvcu    |               3 |                  | U                |              580 |
| tia7502          | Canada                   | Kitchener    |            48 | TX            |      2.29232e+06 | 2.0                  | MGIC Investment                |          7037 | 1-560-405-0048 | R                | ocmgcvnexhqhgoyrwpkgaopthdvandlzaaleqccjpjkbirtcqvorobgskhtlgndvn | wyggjewbe      |               4 | 4.0              | S                |              683 |
| AOI7503          |                          | Saint John   |            14 | CT            | 969707           | 2.0                  | Ross Stores                    |        419269 | 1-261-306-5079 | O                | Cdrxeolwrrxmwmhgexvcstvzz                                         | YMZRQICUTHT    |               1 | 5.0              | M                |              411 |
| PJQ7504          | United States of America | Berkeley     |            29 | UT            |      3.89946e+06 | 9.0                  |                                |         76681 | 1-642-299-6655 | U                | WKSBVOFGJHQGAEKUYRZHHPH                                           | Bcjuycmcen     |               4 | 5.0              | W                |              818 |
| SDV7505          | United States of America | Missoula     |            69 | RI            |      3.74922e+06 | 7.0                  | Alliance One International     |        209116 |                | R                | skxijfqpzshmts                                                    | Nujxguyehf     |               2 | 4.0              | U                |              370 |
| Hga7506          |                          | Salinas      |            47 | DE            |      3.65853e+06 | 6.0                  | Sally Beauty Holdings          |        212203 | 1-388-257-4273 | O                | ZETOHHRKIBHCQCKZODIXJJSXCFY                                       | Neigswk        |               0 | 0.0              | U                |              833 |
| Beo7507          | Canada                   | San Jose     |             0 | NM            |      1.73846e+06 | 2.0                  | Wisconsin Energy               |         42018 |                | U                | LJXAXKUJXQBGWBHJJAAM                                              | WNCEOQPLW      |               5 | 5.0              | M                |              536 |
| Qum7508          | United States of America | Cleveland    |            46 | WV            |      3.3073e+06  | 0.0                  | Carpenter Technology           |         90446 | 1-632-118-1891 | R                | Jmlgjkjbqhrudrkqrm                                                | Cskdwtkf       |               0 | 0.0              | S                |              775 |
| Hud7509          | United States of America | Huntington   |             6 | NH            |      1.81642e+06 | 3.0                  | Liberty Mutual Insurance Group |         16274 | 1-853-806-4986 | R                | Qqcilgblxyikgr                                                    | tcxswloetdt    |               1 | 1.0              | M                |              765 |
| jba7510          | Canada                   | Paterson     |            22 | WY            |      2.59925e+06 | 6.0                  | Black & Decker                 |         22215 | 1-220-687-2027 | O                | Ahtohqjfzfarn                                                     | Fkpemasoukih   |               5 | 2.0              | M                |              555 |



source_headers: AgencyID
Country
City
Age
State
NetWorth
NumberCreditCards
Employer
Income
Phone
OwnOrRentFlag
target_headers: prospect_AgeID
prospect_Co
prospect_C
prospect_Ag
prospect_St
prospect_NeWor
prospect_NumCreCar
prospect_Em
prospect_In
prospect_Ph
prospect_OwORF
column_mappings: AgencyID
prospect_AgeID
Country
prospect_Co
City
prospect_C
Age
prospect_Ag
State
prospect_St
NetWorth
prospect_NeWor
NumberCreditCards
prospect_NumCreCar
Employer
prospect_Em
Income
prospect_In
Phone
prospect_Ph
OwnOrRentFlag
prospect_OwORF
output: {"column_mappings": [["AgencyID", "prospect_AgeID"], ["Country", "prospect_Co"], ["City", "prospect_C"], ["Age", "prospect_Ag"], ["State", "prospect_St"], ["NetWorth", "prospect_NeWor"], ["NumberCreditCards", "prospect_NumCreCar"], ["Employer", "prospect_Em"], ["Income", "prospect_In"], ["Phone", "prospect_Ph"], ["OwnOrRentFlag", "prospect_OwORF"], ["LastName", null], ["FirstName", null], ["MiddleInitial", null], ["Gender", null], ["AddressLine1", null]]}