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   | OwnOrRentFlag   | MaritalStatus   | CreditRating   | Country                  | MiddleInitial   | LastName   | FirstName   | Gender   | AddressLine1         | AddressLine2   | PostalCode   | City           | State                |
|:-----------|:----------------|:----------------|:---------------|:-------------------------|:----------------|:-----------|:------------|:---------|:---------------------|:---------------|:-------------|:---------------|:---------------------|
| PEL0       | O               | W               | 760.0          | United States of America |                 | PELLAND    | Netti       | f        | 21847 olympia street |                | T6b 1i1      | Fairbanks      | MA                   |
| LED1       | U               | U               | 555.0          | United States of America |                 | LEDUC      | TRUDY       | F        | 245 congress court   | APT. 624       | 77281        | Quebec         | PA                   |
| lat2       | O               | S               | 566.0          | United States of America |                 | latif      | ireland     |          | 6517 frailing west   |                | 91355        | Henderson      | Alberta              |
| RUD3       | O               | W               |                | Canada                   |                 | RUDDICK    | Misti       |          | 11449 blalock park   |                | 36615        | Salem          | AR                   |
| JAY4       | O               | M               | 815.0          | Canada                   | M               | JAYAMANNE  | sarena      | f        | 18354 dodd court     | Apt. 619       | t6a 1i3      | Toledo         | OR                   |
| tod5       | R               | M               | 333.0          | United States of America | Z               | todo       | Paulette    | M        | 14117 roxboro street |                | A2b 1v3      | Corpus Christi | VA                   |
| Kan6       | O               |                 | 528.0          | Canada                   | R               | Kanno      | AMALITA     | m        | 24697 FLORENCE WEST  |                | 49513        | Salt Lake City | OH                   |
| Din7       | U               | M               | 680.0          | United States of America | Z               | Dinkel     | Ernesto     |          | 6488 applewood drive |                | M5d 1v6      | Brownsville    | Prince Edward Island |
| Thi8       | O               | U               | 761.0          | United States of America |                 | Thibodeaux | Toby        |          | 17404 gale court     |                | V6c 1q1      | Escondido      | NV                   |
| May9       | O               | M               | 416.0          | United States of America |                 | Mayo       | evangelia   |          | 15913 alexis street  |                | 99716        | Los Angeles    | Ontario              |

TableB:
| prospect_AgencyID   | prospect_OwnOrRentFlag   | prospect_MaritalStatus   |   prospect_CreditRating | prospect_Country         | prospect_MiddleInitial   | prospect_Phone   |   prospect_Income |   prospect_NumberCars | prospect_NumberChildren   |   prospect_Age | prospect_Employer              | prospect_NumberCreditCards   |   prospect_NetWorth |
|:--------------------|:-------------------------|:-------------------------|------------------------:|:-------------------------|:-------------------------|:-----------------|------------------:|----------------------:|:--------------------------|---------------:|:-------------------------------|:-----------------------------|--------------------:|
| Iok7501             | U                        | U                        |                     580 | United States of America | n                        | 1-637-119-9996   |             94490 |                     3 |                           |              7 | FM Global                      |                              |    321776           |
| tia7502             | R                        | S                        |                     683 | Canada                   |                          | 1-560-405-0048   |              7037 |                     4 | 4.0                       |             48 | MGIC Investment                | 2.0                          |         2.29232e+06 |
| AOI7503             | O                        | M                        |                     411 |                          | u                        | 1-261-306-5079   |            419269 |                     1 | 5.0                       |             14 | Ross Stores                    | 2.0                          |    969707           |
| PJQ7504             | U                        | W                        |                     818 | United States of America |                          | 1-642-299-6655   |             76681 |                     4 | 5.0                       |             29 |                                | 9.0                          |         3.89946e+06 |
| SDV7505             | R                        | U                        |                     370 | United States of America |                          |                  |            209116 |                     2 | 4.0                       |             69 | Alliance One International     | 7.0                          |         3.74922e+06 |
| Hga7506             | O                        | U                        |                     833 |                          | F                        | 1-388-257-4273   |            212203 |                     0 | 0.0                       |             47 | Sally Beauty Holdings          | 6.0                          |         3.65853e+06 |
| Beo7507             | U                        | M                        |                     536 | Canada                   | D                        |                  |             42018 |                     5 | 5.0                       |              0 | Wisconsin Energy               | 2.0                          |         1.73846e+06 |
| Qum7508             | R                        | S                        |                     775 | United States of America |                          | 1-632-118-1891   |             90446 |                     0 | 0.0                       |             46 | Carpenter Technology           | 0.0                          |         3.3073e+06  |
| Hud7509             | R                        | M                        |                     765 | United States of America | v                        | 1-853-806-4986   |             16274 |                     1 | 1.0                       |              6 | Liberty Mutual Insurance Group | 3.0                          |         1.81642e+06 |
| jba7510             | O                        | M                        |                     555 | Canada                   |                          | 1-220-687-2027   |             22215 |                     5 | 2.0                       |             22 | Black & Decker                 | 6.0                          |         2.59925e+06 |



source_headers: AgencyID
OwnOrRentFlag
MaritalStatus
CreditRating
Country
MiddleInitial
target_headers: prospect_AgencyID
prospect_OwnOrRentFlag
prospect_MaritalStatus
prospect_CreditRating
prospect_Country
prospect_MiddleInitial
column_mappings: AgencyID
prospect_AgencyID
OwnOrRentFlag
prospect_OwnOrRentFlag
MaritalStatus
prospect_MaritalStatus
CreditRating
prospect_CreditRating
Country
prospect_Country
MiddleInitial
prospect_MiddleInitial
output: {"column_mappings": [["AgencyID", "prospect_AgencyID"], ["OwnOrRentFlag", "prospect_OwnOrRentFlag"], ["MaritalStatus", "prospect_MaritalStatus"], ["CreditRating", "prospect_CreditRating"], ["Country", "prospect_Country"], ["MiddleInitial", "prospect_MiddleInitial"], ["LastName", null], ["FirstName", null], ["Gender", null], ["AddressLine1", null], ["AddressLine2", null], ["PostalCode", null], ["City", null], ["State", null]]}