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   | Phone          | CreditRating   | FirstName   | Age   | OwnOrRentFlag   | LastName   | MiddleInitial   | Gender   | AddressLine1         | AddressLine2   | PostalCode   | City           | State                |
|:-----------|:---------------|:---------------|:------------|:------|:----------------|:-----------|:----------------|:---------|:---------------------|:---------------|:-------------|:---------------|:---------------------|
| PEL0       | 1-712-522-6088 | 760.0          | Netti       | 20.0  | O               | PELLAND    |                 | f        | 21847 olympia street |                | T6b 1i1      | Fairbanks      | MA                   |
| LED1       | 1-626-426-4298 | 555.0          | TRUDY       | 3.0   | U               | LEDUC      |                 | F        | 245 congress court   | APT. 624       | 77281        | Quebec         | PA                   |
| lat2       | 1-524-787-8784 | 566.0          | ireland     |       | O               | latif      |                 |          | 6517 frailing west   |                | 91355        | Henderson      | Alberta              |
| RUD3       | 1-741-997-1688 |                | Misti       | 77.0  | O               | RUDDICK    |                 |          | 11449 blalock park   |                | 36615        | Salem          | AR                   |
| JAY4       | 1-002-194-1991 | 815.0          | sarena      | 21.0  | O               | JAYAMANNE  | M               | f        | 18354 dodd court     | Apt. 619       | t6a 1i3      | Toledo         | OR                   |
| tod5       | 1-441-371-7651 | 333.0          | Paulette    | 77.0  | R               | todo       | Z               | M        | 14117 roxboro street |                | A2b 1v3      | Corpus Christi | VA                   |
| Kan6       | 1-957-940-5980 | 528.0          | AMALITA     | 23.0  | O               | Kanno      | R               | m        | 24697 FLORENCE WEST  |                | 49513        | Salt Lake City | OH                   |
| Din7       | 1-768-633-4096 | 680.0          | Ernesto     | 9.0   | U               | Dinkel     | Z               |          | 6488 applewood drive |                | M5d 1v6      | Brownsville    | Prince Edward Island |
| Thi8       | 1-107-689-2155 | 761.0          | Toby        | 63.0  | O               | Thibodeaux |                 |          | 17404 gale court     |                | V6c 1q1      | Escondido      | NV                   |
| May9       | 1-173-594-6096 | 416.0          | evangelia   | 32.0  | O               | Mayo       |                 |          | 15913 alexis street  |                | 99716        | Los Angeles    | Ontario              |

TableB:
| AgencyID   | Phone          |   CreditRating | FirstName                   |   Age | OwnOrRentFlag   | Country                  |   Income |   NumberCars | NumberChildren   | MaritalStatus   | Employer                       | NumberCreditCards   |         NetWorth |
|:-----------|:---------------|---------------:|:----------------------------|------:|:----------------|:-------------------------|---------:|-------------:|:-----------------|:----------------|:-------------------------------|:--------------------|-----------------:|
| Iok7501    | 1-637-119-9996 |            580 | wbwsqgtaa                   |     7 | U               | United States of America |    94490 |            3 |                  | U               | FM Global                      |                     | 321776           |
| tia7502    | 1-560-405-0048 |            683 | QGJWCPAPZMWHYHZTNOYSSOQBI   |    48 | R               | Canada                   |     7037 |            4 | 4.0              | S               | MGIC Investment                | 2.0                 |      2.29232e+06 |
| AOI7503    | 1-261-306-5079 |            411 | BHGXDDPUMBESLQMNEPREPTZNNKM |    14 | O               |                          |   419269 |            1 | 5.0              | M               | Ross Stores                    | 2.0                 | 969707           |
| PJQ7504    | 1-642-299-6655 |            818 | Xgnvppcxgfnmawlupgfa        |    29 | U               | United States of America |    76681 |            4 | 5.0              | W               |                                | 9.0                 |      3.89946e+06 |
| SDV7505    |                |            370 | Tfiozpstcftslqtwkgngiiwo    |    69 | R               | United States of America |   209116 |            2 | 4.0              | U               | Alliance One International     | 7.0                 |      3.74922e+06 |
| Hga7506    | 1-388-257-4273 |            833 | fbcahlrhhjoslfzqvvwwvhk     |    47 | O               |                          |   212203 |            0 | 0.0              | U               | Sally Beauty Holdings          | 6.0                 |      3.65853e+06 |
| Beo7507    |                |            536 | Dcgkohfcwyoaxckalqnkrzwq    |     0 | U               | Canada                   |    42018 |            5 | 5.0              | M               | Wisconsin Energy               | 2.0                 |      1.73846e+06 |
| Qum7508    | 1-632-118-1891 |            775 | Vmnmcsinflxxmmifydckncc     |    46 | R               | United States of America |    90446 |            0 | 0.0              | S               | Carpenter Technology           | 0.0                 |      3.3073e+06  |
| Hud7509    | 1-853-806-4986 |            765 | Vrkbkkxkddtximspigmlbwzt    |     6 | R               | United States of America |    16274 |            1 | 1.0              | M               | Liberty Mutual Insurance Group | 3.0                 |      1.81642e+06 |
| jba7510    | 1-220-687-2027 |            555 | RMWCTFTLSVTMCBI             |    22 | O               | Canada                   |    22215 |            5 | 2.0              | M               | Black & Decker                 | 6.0                 |      2.59925e+06 |



source_headers: AgencyID
Phone
CreditRating
FirstName
Age
OwnOrRentFlag
target_headers: AgencyID
Phone
CreditRating
FirstName
Age
OwnOrRentFlag
column_mappings: AgencyID
AgencyID
Phone
Phone
CreditRating
CreditRating
FirstName
FirstName
Age
Age
OwnOrRentFlag
OwnOrRentFlag
output: {"column_mappings": [["AgencyID", "AgencyID"], ["Phone", "Phone"], ["CreditRating", "CreditRating"], ["FirstName", "FirstName"], ["Age", "Age"], ["OwnOrRentFlag", "OwnOrRentFlag"], ["LastName", null], ["MiddleInitial", null], ["Gender", null], ["AddressLine1", null], ["AddressLine2", null], ["PostalCode", null], ["City", null], ["State", null]]}