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   | OwnOrRentFlag   | LastName   | City           | CreditRating   |   Income | MiddleInitial   | Employer                 | Phone          | Age   | Country                  | AddressLine1         | NumberChildren   | PostalCode   | NumberCreditCards   | FirstName   | Gender   | AddressLine2   |
|:-----------|:----------------|:-----------|:---------------|:---------------|---------:|:----------------|:-------------------------|:---------------|:------|:-------------------------|:---------------------|:-----------------|:-------------|:--------------------|:------------|:---------|:---------------|
| PEL0       | O               | PELLAND    | Fairbanks      | 760.0          |   368776 |                 | Brink's                  | 1-712-522-6088 | 20.0  | United States of America | 21847 olympia street | 3.0              | T6b 1i1      |                     | Netti       | f        |                |
| LED1       | U               | LEDUC      | Quebec         | 555.0          |   177967 |                 |                          | 1-626-426-4298 | 3.0   | United States of America | 245 congress court   | 1.0              | 77281        | 6.0                 | TRUDY       | F        | APT. 624       |
| lat2       | O               | latif      | Henderson      | 566.0          |   321772 |                 |                          | 1-524-787-8784 |       | United States of America | 6517 frailing west   | 1.0              | 91355        | 6.0                 | ireland     |          |                |
| RUD3       | O               | RUDDICK    | Salem          |                |    25449 |                 | Air Products & Chemicals | 1-741-997-1688 | 77.0  | Canada                   | 11449 blalock park   | 1.0              | 36615        | 3.0                 | Misti       |          |                |
| JAY4       | O               | JAYAMANNE  | Toledo         | 815.0          |   166567 | M               | Oshkosh                  | 1-002-194-1991 | 21.0  | Canada                   | 18354 dodd court     | 3.0              | t6a 1i3      | 4.0                 | sarena      | f        | Apt. 619       |
| tod5       | R               | todo       | Corpus Christi | 333.0          |    43631 | Z               |                          | 1-441-371-7651 | 77.0  | United States of America | 14117 roxboro street | 4.0              | A2b 1v3      | 10.0                | Paulette    | M        |                |
| Kan6       | O               | Kanno      | Salt Lake City | 528.0          |   466230 | R               | VeraSun Energy           | 1-957-940-5980 | 23.0  | Canada                   | 24697 FLORENCE WEST  | 0.0              | 49513        | 1.0                 | AMALITA     | m        |                |
| Din7       | U               | Dinkel     | Brownsville    | 680.0          |   420243 | Z               | IDT                      | 1-768-633-4096 | 9.0   | United States of America | 6488 applewood drive | 2.0              | M5d 1v6      | 7.0                 | Ernesto     |          |                |
| Thi8       | O               | Thibodeaux | Escondido      | 761.0          |   141862 |                 | Adams Resources & Energy | 1-107-689-2155 | 63.0  | United States of America | 17404 gale court     |                  | V6c 1q1      | 10.0                | Toby        |          |                |
| May9       | O               | Mayo       | Los Angeles    | 416.0          |   402011 |                 | MGIC Investment          | 1-173-594-6096 | 32.0  | United States of America | 15913 alexis street  | 2.0              | 99716        |                     | evangelia   |          |                |

TableB:
| AgID   | OwORFl   | LaNa       | Ci             | CreRa   |    Inc | MiInit   | Empl                     | Ph             | A    | Cou                      | AddLi1               | NumChi   | PosC    | NumCreCar   | Sta                  | NuC   | MaSt   |            NeWor |
|:-------|:---------|:-----------|:---------------|:--------|-------:|:---------|:-------------------------|:---------------|:-----|:-------------------------|:---------------------|:---------|:--------|:------------|:---------------------|:------|:-------|-----------------:|
| PEL0   | O        | PELLAND    | Fairbanks      | 760.0   | 368776 |          | Brink's                  | 1-712-522-6088 | 20.0 | United States of America | 21847 olympia street | 3.0      | T6b 1i1 |             | MA                   |       | W      |      1.05887e+06 |
| LED1   | U        | LEDUC      | Quebec         | 555.0   | 177967 |          |                          | 1-626-426-4298 | 3.0  | United States of America | 245 congress court   | 1.0      | 77281   | 6.0         | PA                   | 5.0   | U      |      1.98818e+06 |
| lat2   | O        | latif      | Henderson      | 566.0   | 321772 |          |                          | 1-524-787-8784 |      | United States of America | 6517 frailing west   | 1.0      | 91355   | 6.0         | Alberta              | 2.0   | S      |      3.67313e+06 |
| RUD3   | O        | RUDDICK    | Salem          |         |  25449 |          | Air Products & Chemicals | 1-741-997-1688 | 77.0 | Canada                   | 11449 blalock park   | 1.0      | 36615   | 3.0         | AR                   | 2.0   | W      |      2.0059e+06  |
| JAY4   | O        | JAYAMANNE  | Toledo         | 815.0   | 166567 | M        | Oshkosh                  | 1-002-194-1991 | 21.0 | Canada                   | 18354 dodd court     | 3.0      | t6a 1i3 | 4.0         | OR                   | 0.0   | M      | 624736           |
| tod5   | R        | todo       | Corpus Christi | 333.0   |  43631 | Z        |                          | 1-441-371-7651 | 77.0 | United States of America | 14117 roxboro street | 4.0      | A2b 1v3 | 10.0        | VA                   | 1.0   | M      |      3.06462e+06 |
| Kan6   | O        | Kanno      | Salt Lake City | 528.0   | 466230 | R        | VeraSun Energy           | 1-957-940-5980 | 23.0 | Canada                   | 24697 FLORENCE WEST  | 0.0      | 49513   | 1.0         | OH                   | 4.0   |        |      3.48913e+06 |
| Din7   | U        | Dinkel     | Brownsville    | 680.0   | 420243 | Z        | IDT                      | 1-768-633-4096 | 9.0  | United States of America | 6488 applewood drive | 2.0      | M5d 1v6 | 7.0         | Prince Edward Island | 2.0   | M      |      3.43074e+06 |
| Thi8   | O        | Thibodeaux | Escondido      | 761.0   | 141862 |          | Adams Resources & Energy | 1-107-689-2155 | 63.0 | United States of America | 17404 gale court     |          | V6c 1q1 | 10.0        | NV                   | 3.0   | U      |      1.74361e+06 |
| May9   | O        | Mayo       | Los Angeles    | 416.0   | 402011 |          | MGIC Investment          | 1-173-594-6096 | 32.0 | United States of America | 15913 alexis street  | 2.0      | 99716   |             | Ontario              | 0.0   | M      | 216299           |



source_headers: AgencyID
OwnOrRentFlag
LastName
City
CreditRating
Income
MiddleInitial
Employer
Phone
Age
Country
AddressLine1
NumberChildren
PostalCode
NumberCreditCards
target_headers: AgID
OwORFl
LaNa
Ci
CreRa
Inc
MiInit
Empl
Ph
A
Cou
AddLi1
NumChi
PosC
NumCreCar
column_mappings: AgencyID
AgID
OwnOrRentFlag
OwORFl
LastName
LaNa
City
Ci
CreditRating
CreRa
Income
Inc
MiddleInitial
MiInit
Employer
Empl
Phone
Ph
Age
A
Country
Cou
AddressLine1
AddLi1
NumberChildren
NumChi
PostalCode
PosC
NumberCreditCards
NumCreCar
output: {"column_mappings": [["AgencyID", "AgID"], ["OwnOrRentFlag", "OwORFl"], ["LastName", "LaNa"], ["City", "Ci"], ["CreditRating", "CreRa"], ["Income", "Inc"], ["MiddleInitial", "MiInit"], ["Employer", "Empl"], ["Phone", "Ph"], ["Age", "A"], ["Country", "Cou"], ["AddressLine1", "AddLi1"], ["NumberChildren", "NumChi"], ["PostalCode", "PosC"], ["NumberCreditCards", "NumCreCar"], ["FirstName", null], ["Gender", null], ["AddressLine2", null]]}