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   | NumberCreditCards   | MiddleInitial   | Phone          | OwnOrRentFlag   | NumberCars   | AddressLine2   | LastName   | City           |         NetWorth | State                | FirstName   | Gender   | AddressLine1         | PostalCode   | Country                  |
|:-----------|:--------------------|:----------------|:---------------|:----------------|:-------------|:---------------|:-----------|:---------------|-----------------:|:---------------------|:------------|:---------|:---------------------|:-------------|:-------------------------|
| PEL0       |                     |                 | 1-712-522-6088 | O               |              |                | PELLAND    | Fairbanks      |      1.05887e+06 | MA                   | Netti       | f        | 21847 olympia street | T6b 1i1      | United States of America |
| LED1       | 6.0                 |                 | 1-626-426-4298 | U               | 5.0          | APT. 624       | LEDUC      | Quebec         |      1.98818e+06 | PA                   | TRUDY       | F        | 245 congress court   | 77281        | United States of America |
| lat2       | 6.0                 |                 | 1-524-787-8784 | O               | 2.0          |                | latif      | Henderson      |      3.67313e+06 | Alberta              | ireland     |          | 6517 frailing west   | 91355        | United States of America |
| RUD3       | 3.0                 |                 | 1-741-997-1688 | O               | 2.0          |                | RUDDICK    | Salem          |      2.0059e+06  | AR                   | Misti       |          | 11449 blalock park   | 36615        | Canada                   |
| JAY4       | 4.0                 | M               | 1-002-194-1991 | O               | 0.0          | Apt. 619       | JAYAMANNE  | Toledo         | 624736           | OR                   | sarena      | f        | 18354 dodd court     | t6a 1i3      | Canada                   |
| tod5       | 10.0                | Z               | 1-441-371-7651 | R               | 1.0          |                | todo       | Corpus Christi |      3.06462e+06 | VA                   | Paulette    | M        | 14117 roxboro street | A2b 1v3      | United States of America |
| Kan6       | 1.0                 | R               | 1-957-940-5980 | O               | 4.0          |                | Kanno      | Salt Lake City |      3.48913e+06 | OH                   | AMALITA     | m        | 24697 FLORENCE WEST  | 49513        | Canada                   |
| Din7       | 7.0                 | Z               | 1-768-633-4096 | U               | 2.0          |                | Dinkel     | Brownsville    |      3.43074e+06 | Prince Edward Island | Ernesto     |          | 6488 applewood drive | M5d 1v6      | United States of America |
| Thi8       | 10.0                |                 | 1-107-689-2155 | O               | 3.0          |                | Thibodeaux | Escondido      |      1.74361e+06 | NV                   | Toby        |          | 17404 gale court     | V6c 1q1      | United States of America |
| May9       |                     |                 | 1-173-594-6096 | O               | 0.0          |                | Mayo       | Los Angeles    | 216299           | Ontario              | evangelia   |          | 15913 alexis street  | 99716        | United States of America |

TableB:
| prospect_AgencyID   | prospect_NumberCreditCards   | prospect_MiddleInitial   | prospect_Phone   | prospect_OwnOrRentFlag   | prospect_NumberCars   | prospect_AddressLine2   | prospect_LastName   | prospect_City   |   prospect_NetWorth | prospect_State       |   prospect_Income | prospect_NumberChildren   | prospect_MaritalStatus   | prospect_Age   | prospect_CreditRating   | prospect_Employer        |
|:--------------------|:-----------------------------|:-------------------------|:-----------------|:-------------------------|:----------------------|:------------------------|:--------------------|:----------------|--------------------:|:---------------------|------------------:|:--------------------------|:-------------------------|:---------------|:------------------------|:-------------------------|
| PEL0                |                              |                          | 1-712-522-6088   | O                        |                       |                         | PELLAND             | Fairbanks       |         1.05887e+06 | MA                   |            368776 | 3.0                       | W                        | 20.0           | 760.0                   | Brink's                  |
| LED1                | 6.0                          |                          | 1-626-426-4298   | U                        | 5.0                   | APT. 624                | LEDUC               | Quebec          |         1.98818e+06 | PA                   |            177967 | 1.0                       | U                        | 3.0            | 555.0                   |                          |
| lat2                | 6.0                          |                          | 1-524-787-8784   | O                        | 2.0                   |                         | latif               | Henderson       |         3.67313e+06 | Alberta              |            321772 | 1.0                       | S                        |                | 566.0                   |                          |
| RUD3                | 3.0                          |                          | 1-741-997-1688   | O                        | 2.0                   |                         | RUDDICK             | Salem           |         2.0059e+06  | AR                   |             25449 | 1.0                       | W                        | 77.0           |                         | Air Products & Chemicals |
| JAY4                | 4.0                          | M                        | 1-002-194-1991   | O                        | 0.0                   | Apt. 619                | JAYAMANNE           | Toledo          |    624736           | OR                   |            166567 | 3.0                       | M                        | 21.0           | 815.0                   | Oshkosh                  |
| tod5                | 10.0                         | Z                        | 1-441-371-7651   | R                        | 1.0                   |                         | todo                | Corpus Christi  |         3.06462e+06 | VA                   |             43631 | 4.0                       | M                        | 77.0           | 333.0                   |                          |
| Kan6                | 1.0                          | R                        | 1-957-940-5980   | O                        | 4.0                   |                         | Kanno               | Salt Lake City  |         3.48913e+06 | OH                   |            466230 | 0.0                       |                          | 23.0           | 528.0                   | VeraSun Energy           |
| Din7                | 7.0                          | Z                        | 1-768-633-4096   | U                        | 2.0                   |                         | Dinkel              | Brownsville     |         3.43074e+06 | Prince Edward Island |            420243 | 2.0                       | M                        | 9.0            | 680.0                   | IDT                      |
| Thi8                | 10.0                         |                          | 1-107-689-2155   | O                        | 3.0                   |                         | Thibodeaux          | Escondido       |         1.74361e+06 | NV                   |            141862 |                           | U                        | 63.0           | 761.0                   | Adams Resources & Energy |
| May9                |                              |                          | 1-173-594-6096   | O                        | 0.0                   |                         | Mayo                | Los Angeles     |    216299           | Ontario              |            402011 | 2.0                       | M                        | 32.0           | 416.0                   | MGIC Investment          |



source_headers: AgencyID
NumberCreditCards
MiddleInitial
Phone
OwnOrRentFlag
NumberCars
AddressLine2
LastName
City
NetWorth
State
target_headers: prospect_AgencyID
prospect_NumberCreditCards
prospect_MiddleInitial
prospect_Phone
prospect_OwnOrRentFlag
prospect_NumberCars
prospect_AddressLine2
prospect_LastName
prospect_City
prospect_NetWorth
prospect_State
column_mappings: AgencyID
prospect_AgencyID
NumberCreditCards
prospect_NumberCreditCards
MiddleInitial
prospect_MiddleInitial
Phone
prospect_Phone
OwnOrRentFlag
prospect_OwnOrRentFlag
NumberCars
prospect_NumberCars
AddressLine2
prospect_AddressLine2
LastName
prospect_LastName
City
prospect_City
NetWorth
prospect_NetWorth
State
prospect_State
output: {"column_mappings": [["AgencyID", "prospect_AgencyID"], ["NumberCreditCards", "prospect_NumberCreditCards"], ["MiddleInitial", "prospect_MiddleInitial"], ["Phone", "prospect_Phone"], ["OwnOrRentFlag", "prospect_OwnOrRentFlag"], ["NumberCars", "prospect_NumberCars"], ["AddressLine2", "prospect_AddressLine2"], ["LastName", "prospect_LastName"], ["City", "prospect_City"], ["NetWorth", "prospect_NetWorth"], ["State", "prospect_State"], ["FirstName", null], ["Gender", null], ["AddressLine1", null], ["PostalCode", null], ["Country", null]]}