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   | Age   | NumberChildren   | PostalCode   | Country                  | MaritalStatus   | LastName   | FirstName   | MiddleInitial   | Gender   | AddressLine1         | AddressLine2   | City           | State                |
|:-----------|:------|:-----------------|:-------------|:-------------------------|:----------------|:-----------|:------------|:----------------|:---------|:---------------------|:---------------|:---------------|:---------------------|
| PEL0       | 20.0  | 3.0              | T6b 1i1      | United States of America | W               | PELLAND    | Netti       |                 | f        | 21847 olympia street |                | Fairbanks      | MA                   |
| LED1       | 3.0   | 1.0              | 77281        | United States of America | U               | LEDUC      | TRUDY       |                 | F        | 245 congress court   | APT. 624       | Quebec         | PA                   |
| lat2       |       | 1.0              | 91355        | United States of America | S               | latif      | ireland     |                 |          | 6517 frailing west   |                | Henderson      | Alberta              |
| RUD3       | 77.0  | 1.0              | 36615        | Canada                   | W               | RUDDICK    | Misti       |                 |          | 11449 blalock park   |                | Salem          | AR                   |
| JAY4       | 21.0  | 3.0              | t6a 1i3      | Canada                   | M               | JAYAMANNE  | sarena      | M               | f        | 18354 dodd court     | Apt. 619       | Toledo         | OR                   |
| tod5       | 77.0  | 4.0              | A2b 1v3      | United States of America | M               | todo       | Paulette    | Z               | M        | 14117 roxboro street |                | Corpus Christi | VA                   |
| Kan6       | 23.0  | 0.0              | 49513        | Canada                   |                 | Kanno      | AMALITA     | R               | m        | 24697 FLORENCE WEST  |                | Salt Lake City | OH                   |
| Din7       | 9.0   | 2.0              | M5d 1v6      | United States of America | M               | Dinkel     | Ernesto     | Z               |          | 6488 applewood drive |                | Brownsville    | Prince Edward Island |
| Thi8       | 63.0  |                  | V6c 1q1      | United States of America | U               | Thibodeaux | Toby        |                 |          | 17404 gale court     |                | Escondido      | NV                   |
| May9       | 32.0  | 2.0              | 99716        | United States of America | M               | Mayo       | evangelia   |                 |          | 15913 alexis street  |                | Los Angeles    | Ontario              |

TableB:
| AgeID   |   A | NuChi   | PoCo         | Co                       | MariSta   | Pho            |    Inc |   NuC |   CreRat | OwORF   | Em                             | NuCreCa   |              NWo |
|:--------|----:|:--------|:-------------|:-------------------------|:----------|:---------------|-------:|------:|---------:|:--------|:-------------------------------|:----------|-----------------:|
| Iok7501 |   7 |         | Guudshirvcu  | United States of America | U         | 1-637-119-9996 |  94490 |     3 |      580 | U       | FM Global                      |           | 321776           |
| tia7502 |  48 | 4.0     | wyggjewbe    | Canada                   | S         | 1-560-405-0048 |   7037 |     4 |      683 | R       | MGIC Investment                | 2.0       |      2.29232e+06 |
| AOI7503 |  14 | 5.0     | YMZRQICUTHT  |                          | M         | 1-261-306-5079 | 419269 |     1 |      411 | O       | Ross Stores                    | 2.0       | 969707           |
| PJQ7504 |  29 | 5.0     | Bcjuycmcen   | United States of America | W         | 1-642-299-6655 |  76681 |     4 |      818 | U       |                                | 9.0       |      3.89946e+06 |
| SDV7505 |  69 | 4.0     | Nujxguyehf   | United States of America | U         |                | 209116 |     2 |      370 | R       | Alliance One International     | 7.0       |      3.74922e+06 |
| Hga7506 |  47 | 0.0     | Neigswk      |                          | U         | 1-388-257-4273 | 212203 |     0 |      833 | O       | Sally Beauty Holdings          | 6.0       |      3.65853e+06 |
| Beo7507 |   0 | 5.0     | WNCEOQPLW    | Canada                   | M         |                |  42018 |     5 |      536 | U       | Wisconsin Energy               | 2.0       |      1.73846e+06 |
| Qum7508 |  46 | 0.0     | Cskdwtkf     | United States of America | S         | 1-632-118-1891 |  90446 |     0 |      775 | R       | Carpenter Technology           | 0.0       |      3.3073e+06  |
| Hud7509 |   6 | 1.0     | tcxswloetdt  | United States of America | M         | 1-853-806-4986 |  16274 |     1 |      765 | R       | Liberty Mutual Insurance Group | 3.0       |      1.81642e+06 |
| jba7510 |  22 | 2.0     | Fkpemasoukih | Canada                   | M         | 1-220-687-2027 |  22215 |     5 |      555 | O       | Black & Decker                 | 6.0       |      2.59925e+06 |



source_headers: AgencyID
Age
NumberChildren
PostalCode
Country
MaritalStatus
target_headers: AgeID
A
NuChi
PoCo
Co
MariSta
column_mappings: AgencyID
AgeID
Age
A
NumberChildren
NuChi
PostalCode
PoCo
Country
Co
MaritalStatus
MariSta
output: {"column_mappings": [["AgencyID", "AgeID"], ["Age", "A"], ["NumberChildren", "NuChi"], ["PostalCode", "PoCo"], ["Country", "Co"], ["MaritalStatus", "MariSta"], ["LastName", null], ["FirstName", null], ["MiddleInitial", null], ["Gender", null], ["AddressLine1", null], ["AddressLine2", null], ["City", null], ["State", null]]}