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   | AddressLine1         | PostalCode   |   Income | FirstName   | Phone          | CreditRating   | Employer                 | MaritalStatus   | Age   | NumberChildren   | LastName   | MiddleInitial   | Gender   | AddressLine2   | City           |
|:-----------|:---------------------|:-------------|---------:|:------------|:---------------|:---------------|:-------------------------|:----------------|:------|:-----------------|:-----------|:----------------|:---------|:---------------|:---------------|
| PEL0       | 21847 olympia street | T6b 1i1      |   368776 | Netti       | 1-712-522-6088 | 760.0          | Brink's                  | W               | 20.0  | 3.0              | PELLAND    |                 | f        |                | Fairbanks      |
| LED1       | 245 congress court   | 77281        |   177967 | TRUDY       | 1-626-426-4298 | 555.0          |                          | U               | 3.0   | 1.0              | LEDUC      |                 | F        | APT. 624       | Quebec         |
| lat2       | 6517 frailing west   | 91355        |   321772 | ireland     | 1-524-787-8784 | 566.0          |                          | S               |       | 1.0              | latif      |                 |          |                | Henderson      |
| RUD3       | 11449 blalock park   | 36615        |    25449 | Misti       | 1-741-997-1688 |                | Air Products & Chemicals | W               | 77.0  | 1.0              | RUDDICK    |                 |          |                | Salem          |
| JAY4       | 18354 dodd court     | t6a 1i3      |   166567 | sarena      | 1-002-194-1991 | 815.0          | Oshkosh                  | M               | 21.0  | 3.0              | JAYAMANNE  | M               | f        | Apt. 619       | Toledo         |
| tod5       | 14117 roxboro street | A2b 1v3      |    43631 | Paulette    | 1-441-371-7651 | 333.0          |                          | M               | 77.0  | 4.0              | todo       | Z               | M        |                | Corpus Christi |
| Kan6       | 24697 FLORENCE WEST  | 49513        |   466230 | AMALITA     | 1-957-940-5980 | 528.0          | VeraSun Energy           |                 | 23.0  | 0.0              | Kanno      | R               | m        |                | Salt Lake City |
| Din7       | 6488 applewood drive | M5d 1v6      |   420243 | Ernesto     | 1-768-633-4096 | 680.0          | IDT                      | M               | 9.0   | 2.0              | Dinkel     | Z               |          |                | Brownsville    |
| Thi8       | 17404 gale court     | V6c 1q1      |   141862 | Toby        | 1-107-689-2155 | 761.0          | Adams Resources & Energy | U               | 63.0  |                  | Thibodeaux |                 |          |                | Escondido      |
| May9       | 15913 alexis street  | 99716        |   402011 | evangelia   | 1-173-594-6096 | 416.0          | MGIC Investment          | M               | 32.0  | 2.0              | Mayo       |                 |          |                | Los Angeles    |

TableB:
| AgeID   | AddLi1               | PoCo    |    Inc | FiN       | Pho            | CreRa   | Em                       | MarSt   | Ag   | NumChil   | St                   | Cou                      | NumC   | OwORF   | NuCrCar   |             NeWo |
|:--------|:---------------------|:--------|-------:|:----------|:---------------|:--------|:-------------------------|:--------|:-----|:----------|:---------------------|:-------------------------|:-------|:--------|:----------|-----------------:|
| PEL0    | 21847 olympia street | T6b 1i1 | 368776 | Netti     | 1-712-522-6088 | 760.0   | Brink's                  | W       | 20.0 | 3.0       | MA                   | United States of America |        | O       |           |      1.05887e+06 |
| LED1    | 245 congress court   | 77281   | 177967 | TRUDY     | 1-626-426-4298 | 555.0   |                          | U       | 3.0  | 1.0       | PA                   | United States of America | 5.0    | U       | 6.0       |      1.98818e+06 |
| lat2    | 6517 frailing west   | 91355   | 321772 | ireland   | 1-524-787-8784 | 566.0   |                          | S       |      | 1.0       | Alberta              | United States of America | 2.0    | O       | 6.0       |      3.67313e+06 |
| RUD3    | 11449 blalock park   | 36615   |  25449 | Misti     | 1-741-997-1688 |         | Air Products & Chemicals | W       | 77.0 | 1.0       | AR                   | Canada                   | 2.0    | O       | 3.0       |      2.0059e+06  |
| JAY4    | 18354 dodd court     | t6a 1i3 | 166567 | sarena    | 1-002-194-1991 | 815.0   | Oshkosh                  | M       | 21.0 | 3.0       | OR                   | Canada                   | 0.0    | O       | 4.0       | 624736           |
| tod5    | 14117 roxboro street | A2b 1v3 |  43631 | Paulette  | 1-441-371-7651 | 333.0   |                          | M       | 77.0 | 4.0       | VA                   | United States of America | 1.0    | R       | 10.0      |      3.06462e+06 |
| Kan6    | 24697 FLORENCE WEST  | 49513   | 466230 | AMALITA   | 1-957-940-5980 | 528.0   | VeraSun Energy           |         | 23.0 | 0.0       | OH                   | Canada                   | 4.0    | O       | 1.0       |      3.48913e+06 |
| Din7    | 6488 applewood drive | M5d 1v6 | 420243 | Ernesto   | 1-768-633-4096 | 680.0   | IDT                      | M       | 9.0  | 2.0       | Prince Edward Island | United States of America | 2.0    | U       | 7.0       |      3.43074e+06 |
| Thi8    | 17404 gale court     | V6c 1q1 | 141862 | Toby      | 1-107-689-2155 | 761.0   | Adams Resources & Energy | U       | 63.0 |           | NV                   | United States of America | 3.0    | O       | 10.0      |      1.74361e+06 |
| May9    | 15913 alexis street  | 99716   | 402011 | evangelia | 1-173-594-6096 | 416.0   | MGIC Investment          | M       | 32.0 | 2.0       | Ontario              | United States of America | 0.0    | O       |           | 216299           |



source_headers: AgencyID
AddressLine1
PostalCode
Income
FirstName
Phone
CreditRating
Employer
MaritalStatus
Age
NumberChildren
target_headers: AgeID
AddLi1
PoCo
Inc
FiN
Pho
CreRa
Em
MarSt
Ag
NumChil
column_mappings: AgencyID
AgeID
AddressLine1
AddLi1
PostalCode
PoCo
Income
Inc
FirstName
FiN
Phone
Pho
CreditRating
CreRa
Employer
Em
MaritalStatus
MarSt
Age
Ag
NumberChildren
NumChil
output: {"column_mappings": [["AgencyID", "AgeID"], ["AddressLine1", "AddLi1"], ["PostalCode", "PoCo"], ["Income", "Inc"], ["FirstName", "FiN"], ["Phone", "Pho"], ["CreditRating", "CreRa"], ["Employer", "Em"], ["MaritalStatus", "MarSt"], ["Age", "Ag"], ["NumberChildren", "NumChil"], ["LastName", null], ["MiddleInitial", null], ["Gender", null], ["AddressLine2", null], ["City", null]]}