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   | CreditRating   | NumberCreditCards   | NumberChildren   | FirstName   | MaritalStatus   | LastName   | MiddleInitial   | Gender   | AddressLine1         | AddressLine2   | PostalCode   | City           | State                |
|:-----------|:---------------|:--------------------|:-----------------|:------------|:----------------|:-----------|:----------------|:---------|:---------------------|:---------------|:-------------|:---------------|:---------------------|
| PEL0       | 760.0          |                     | 3.0              | Netti       | W               | PELLAND    |                 | f        | 21847 olympia street |                | T6b 1i1      | Fairbanks      | MA                   |
| LED1       | 555.0          | 6.0                 | 1.0              | TRUDY       | U               | LEDUC      |                 | F        | 245 congress court   | APT. 624       | 77281        | Quebec         | PA                   |
| lat2       | 566.0          | 6.0                 | 1.0              | ireland     | S               | latif      |                 |          | 6517 frailing west   |                | 91355        | Henderson      | Alberta              |
| RUD3       |                | 3.0                 | 1.0              | Misti       | W               | RUDDICK    |                 |          | 11449 blalock park   |                | 36615        | Salem          | AR                   |
| JAY4       | 815.0          | 4.0                 | 3.0              | sarena      | M               | JAYAMANNE  | M               | f        | 18354 dodd court     | Apt. 619       | t6a 1i3      | Toledo         | OR                   |
| tod5       | 333.0          | 10.0                | 4.0              | Paulette    | M               | todo       | Z               | M        | 14117 roxboro street |                | A2b 1v3      | Corpus Christi | VA                   |
| Kan6       | 528.0          | 1.0                 | 0.0              | AMALITA     |                 | Kanno      | R               | m        | 24697 FLORENCE WEST  |                | 49513        | Salt Lake City | OH                   |
| Din7       | 680.0          | 7.0                 | 2.0              | Ernesto     | M               | Dinkel     | Z               |          | 6488 applewood drive |                | M5d 1v6      | Brownsville    | Prince Edward Island |
| Thi8       | 761.0          | 10.0                |                  | Toby        | U               | Thibodeaux |                 |          | 17404 gale court     |                | V6c 1q1      | Escondido      | NV                   |
| May9       | 416.0          |                     | 2.0              | evangelia   | M               | Mayo       |                 |          | 15913 alexis street  |                | 99716        | Los Angeles    | Ontario              |

TableB:
| AgeID   | CreRat   | NuCreCa   | NumChi   | FiN       | MariSta   | Co                       | Pho            |    Inc | NuC   | A    | OwORF   | Empl                     |              NWo |
|:--------|:---------|:----------|:---------|:----------|:----------|:-------------------------|:---------------|-------:|:------|:-----|:--------|:-------------------------|-----------------:|
| PEL0    | 760.0    |           | 3.0      | Netti     | W         | United States of America | 1-712-522-6088 | 368776 |       | 20.0 | O       | Brink's                  |      1.05887e+06 |
| LED1    | 555.0    | 6.0       | 1.0      | TRUDY     | U         | United States of America | 1-626-426-4298 | 177967 | 5.0   | 3.0  | U       |                          |      1.98818e+06 |
| lat2    | 566.0    | 6.0       | 1.0      | ireland   | S         | United States of America | 1-524-787-8784 | 321772 | 2.0   |      | O       |                          |      3.67313e+06 |
| RUD3    |          | 3.0       | 1.0      | Misti     | W         | Canada                   | 1-741-997-1688 |  25449 | 2.0   | 77.0 | O       | Air Products & Chemicals |      2.0059e+06  |
| JAY4    | 815.0    | 4.0       | 3.0      | sarena    | M         | Canada                   | 1-002-194-1991 | 166567 | 0.0   | 21.0 | O       | Oshkosh                  | 624736           |
| tod5    | 333.0    | 10.0      | 4.0      | Paulette  | M         | United States of America | 1-441-371-7651 |  43631 | 1.0   | 77.0 | R       |                          |      3.06462e+06 |
| Kan6    | 528.0    | 1.0       | 0.0      | AMALITA   |           | Canada                   | 1-957-940-5980 | 466230 | 4.0   | 23.0 | O       | VeraSun Energy           |      3.48913e+06 |
| Din7    | 680.0    | 7.0       | 2.0      | Ernesto   | M         | United States of America | 1-768-633-4096 | 420243 | 2.0   | 9.0  | U       | IDT                      |      3.43074e+06 |
| Thi8    | 761.0    | 10.0      |          | Toby      | U         | United States of America | 1-107-689-2155 | 141862 | 3.0   | 63.0 | O       | Adams Resources & Energy |      1.74361e+06 |
| May9    | 416.0    |           | 2.0      | evangelia | M         | United States of America | 1-173-594-6096 | 402011 | 0.0   | 32.0 | O       | MGIC Investment          | 216299           |



source_headers: AgencyID
CreditRating
NumberCreditCards
NumberChildren
FirstName
MaritalStatus
target_headers: AgeID
CreRat
NuCreCa
NumChi
FiN
MariSta
column_mappings: AgencyID
AgeID
CreditRating
CreRat
NumberCreditCards
NuCreCa
NumberChildren
NumChi
FirstName
FiN
MaritalStatus
MariSta
output: {"column_mappings": [["AgencyID", "AgeID"], ["CreditRating", "CreRat"], ["NumberCreditCards", "NuCreCa"], ["NumberChildren", "NumChi"], ["FirstName", "FiN"], ["MaritalStatus", "MariSta"], ["LastName", null], ["MiddleInitial", null], ["Gender", null], ["AddressLine1", null], ["AddressLine2", null], ["PostalCode", null], ["City", null], ["State", null]]}