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

TableB:
| AgID   | Pho            |    Inc | NumCa   | NuChi   | MaSt   | Ag   | CreRat   | OOReF   | Emp                      | NumCreCa   |             NWor |
|:-------|:---------------|-------:|:--------|:--------|:-------|:-----|:---------|:--------|:-------------------------|:-----------|-----------------:|
| PEL0   | 1-712-522-6088 | 368776 |         | 3.0     | W      | 20.0 | 760.0    | O       | Brink's                  |            |      1.05887e+06 |
| LED1   | 1-626-426-4298 | 177967 | 5.0     | 1.0     | U      | 3.0  | 555.0    | U       |                          | 6.0        |      1.98818e+06 |
| lat2   | 1-524-787-8784 | 321772 | 2.0     | 1.0     | S      |      | 566.0    | O       |                          | 6.0        |      3.67313e+06 |
| RUD3   | 1-741-997-1688 |  25449 | 2.0     | 1.0     | W      | 77.0 |          | O       | Air Products & Chemicals | 3.0        |      2.0059e+06  |
| JAY4   | 1-002-194-1991 | 166567 | 0.0     | 3.0     | M      | 21.0 | 815.0    | O       | Oshkosh                  | 4.0        | 624736           |
| tod5   | 1-441-371-7651 |  43631 | 1.0     | 4.0     | M      | 77.0 | 333.0    | R       |                          | 10.0       |      3.06462e+06 |
| Kan6   | 1-957-940-5980 | 466230 | 4.0     | 0.0     |        | 23.0 | 528.0    | O       | VeraSun Energy           | 1.0        |      3.48913e+06 |
| Din7   | 1-768-633-4096 | 420243 | 2.0     | 2.0     | M      | 9.0  | 680.0    | U       | IDT                      | 7.0        |      3.43074e+06 |
| Thi8   | 1-107-689-2155 | 141862 | 3.0     |         | U      | 63.0 | 761.0    | O       | Adams Resources & Energy | 10.0       |      1.74361e+06 |
| May9   | 1-173-594-6096 | 402011 | 0.0     | 2.0     | M      | 32.0 | 416.0    | O       | MGIC Investment          |            | 216299           |



source_headers: AgencyID
target_headers: AgID
column_mappings: AgencyID
AgID
output: {"column_mappings": [["AgencyID", "AgID"], ["LastName", null], ["FirstName", null], ["MiddleInitial", null], ["Gender", null], ["AddressLine1", null], ["AddressLine2", null], ["PostalCode", null], ["City", null], ["State", null], ["Country", null]]}