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   | AddressLine2   | NumberChildren   | NumberCars   | Gender   | PostalCode   | LastName   | FirstName   | MiddleInitial   | AddressLine1         | City           | State                | Country                  | Phone          |
|:-----------|:---------------|:-----------------|:-------------|:---------|:-------------|:-----------|:------------|:----------------|:---------------------|:---------------|:---------------------|:-------------------------|:---------------|
| PEL0       |                | 7.0              |              | f        | Tyb1i1       | PELLAND    | Netti       |                 | 21847 olympia street | Fairbanks      | MA                   | United States of America | 1-712-522-6088 |
| LED1       | APT623         | 4.0              | 0.0          | F        | 77281        | LEDUC      | TRUDY       |                 | 245 congress court   | Quebec         | PA                   | United States of America | 1-626-426-4298 |
| lat2       |                | 2.0              | 2.0          |          | 91355        | latif      | ireland     |                 | 6517 frailing west   | Henderson      | Alberta              | United States of America | 1-524-787-8784 |
| RUD3       |                | 6.0              | 4.0          |          | 36615        | RUDDICK    | Misti       |                 | 11449 blalock park   | Salem          | AR                   | Canada                   | 1-741-997-1688 |
| JAY4       | A0t619         | 5.0              | 7.0          | f        | t6a1l3       | JAYAMANNE  | sarena      | M               | 18354 dodd court     | Toledo         | OR                   | Canada                   | 1-002-194-1991 |
| tod5       |                | 5.0              | 4.0          | M        | A2b2v3       | todo       | Paulette    | Z               | 14117 roxboro street | Corpus Christi | VA                   | United States of America | 1-441-371-7651 |
| Kan6       |                | 4.0              | 2.0          | m        | 49513        | Kanno      | AMALITA     | R               | 24697 FLORENCE WEST  | Salt Lake City | OH                   | Canada                   | 1-957-940-5980 |
| Din7       |                | 0.0              | 2.0          |          | M5d1vy       | Dinkel     | Ernesto     | Z               | 6488 applewood drive | Brownsville    | Prince Edward Island | United States of America | 1-768-633-4096 |
| Thi8       |                |                  | 2.0          |          | V6f1q1       | Thibodeaux | Toby        |                 | 17404 gale court     | Escondido      | NV                   | United States of America | 1-107-689-2155 |
| May9       |                | 0.0              | 3.0          |          | 99716        | Mayo       | evangelia   |                 | 15913 alexis street  | Los Angeles    | Ontario              | United States of America | 1-173-594-6096 |

TableB:
| AgencyID   | AddressLine2   | NumberChildren   | NumberCars   | Gender   | PostalCode   |   Income | MaritalStatus   | Age   | CreditRating   | OwnOrRentFlag   | Employer                 | NumberCreditCards   |         NetWorth |
|:-----------|:---------------|:-----------------|:-------------|:---------|:-------------|---------:|:----------------|:------|:---------------|:----------------|:-------------------------|:--------------------|-----------------:|
| PEL0       |                | 3.0              |              | f        | T6b 1i1      |   368776 | W               | 20.0  | 760.0          | O               | Brink's                  |                     |      1.05887e+06 |
| LED1       | APT. 624       | 1.0              | 5.0          | F        | 77281        |   177967 | U               | 3.0   | 555.0          | U               |                          | 6.0                 |      1.98818e+06 |
| lat2       |                | 1.0              | 2.0          |          | 91355        |   321772 | S               |       | 566.0          | O               |                          | 6.0                 |      3.67313e+06 |
| RUD3       |                | 1.0              | 2.0          |          | 36615        |    25449 | W               | 77.0  |                | O               | Air Products & Chemicals | 3.0                 |      2.0059e+06  |
| JAY4       | Apt. 619       | 3.0              | 0.0          | f        | t6a 1i3      |   166567 | M               | 21.0  | 815.0          | O               | Oshkosh                  | 4.0                 | 624736           |
| tod5       |                | 4.0              | 1.0          | M        | A2b 1v3      |    43631 | M               | 77.0  | 333.0          | R               |                          | 10.0                |      3.06462e+06 |
| Kan6       |                | 0.0              | 4.0          | m        | 49513        |   466230 |                 | 23.0  | 528.0          | O               | VeraSun Energy           | 1.0                 |      3.48913e+06 |
| Din7       |                | 2.0              | 2.0          |          | M5d 1v6      |   420243 | M               | 9.0   | 680.0          | U               | IDT                      | 7.0                 |      3.43074e+06 |
| Thi8       |                |                  | 3.0          |          | V6c 1q1      |   141862 | U               | 63.0  | 761.0          | O               | Adams Resources & Energy | 10.0                |      1.74361e+06 |
| May9       |                | 2.0              | 0.0          |          | 99716        |   402011 | M               | 32.0  | 416.0          | O               | MGIC Investment          |                     | 216299           |



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