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   | Employer                 | NumberChildren   | CreditRating   | NumberCars   | AddressLine2   | PostalCode   | Gender   | NumberCreditCards   | FirstName   |   Income | Phone          | AddressLine1         | MiddleInitial   | City           | LastName   | State                | Country                  |
|:-----------|:-------------------------|:-----------------|:---------------|:-------------|:---------------|:-------------|:---------|:--------------------|:------------|---------:|:---------------|:---------------------|:----------------|:---------------|:-----------|:---------------------|:-------------------------|
| PEL0       | Brink's                  | 3.0              | 760.0          |              |                | T6b 1i1      | f        |                     | Netti       |   368776 | 1-712-522-6088 | 21847 olympia street |                 | Fairbanks      | PELLAND    | MA                   | United States of America |
| LED1       |                          | 1.0              | 555.0          | 5.0          | APT. 624       | 77281        | F        | 6.0                 | TRUDY       |   177967 | 1-626-426-4298 | 245 congress court   |                 | Quebec         | LEDUC      | PA                   | United States of America |
| lat2       |                          | 1.0              | 566.0          | 2.0          |                | 91355        |          | 6.0                 | ireland     |   321772 | 1-524-787-8784 | 6517 frailing west   |                 | Henderson      | latif      | Alberta              | United States of America |
| RUD3       | Air Products & Chemicals | 1.0              |                | 2.0          |                | 36615        |          | 3.0                 | Misti       |    25449 | 1-741-997-1688 | 11449 blalock park   |                 | Salem          | RUDDICK    | AR                   | Canada                   |
| JAY4       | Oshkosh                  | 3.0              | 815.0          | 0.0          | Apt. 619       | t6a 1i3      | f        | 4.0                 | sarena      |   166567 | 1-002-194-1991 | 18354 dodd court     | M               | Toledo         | JAYAMANNE  | OR                   | Canada                   |
| tod5       |                          | 4.0              | 333.0          | 1.0          |                | A2b 1v3      | M        | 10.0                | Paulette    |    43631 | 1-441-371-7651 | 14117 roxboro street | Z               | Corpus Christi | todo       | VA                   | United States of America |
| Kan6       | VeraSun Energy           | 0.0              | 528.0          | 4.0          |                | 49513        | m        | 1.0                 | AMALITA     |   466230 | 1-957-940-5980 | 24697 FLORENCE WEST  | R               | Salt Lake City | Kanno      | OH                   | Canada                   |
| Din7       | IDT                      | 2.0              | 680.0          | 2.0          |                | M5d 1v6      |          | 7.0                 | Ernesto     |   420243 | 1-768-633-4096 | 6488 applewood drive | Z               | Brownsville    | Dinkel     | Prince Edward Island | United States of America |
| Thi8       | Adams Resources & Energy |                  | 761.0          | 3.0          |                | V6c 1q1      |          | 10.0                | Toby        |   141862 | 1-107-689-2155 | 17404 gale court     |                 | Escondido      | Thibodeaux | NV                   | United States of America |
| May9       | MGIC Investment          | 2.0              | 416.0          | 0.0          |                | 99716        |          |                     | evangelia   |   402011 | 1-173-594-6096 | 15913 alexis street  |                 | Los Angeles    | Mayo       | Ontario              | United States of America |

TableB:
| prospect_AgencyID   | prospect_Employer        | prospect_NumberChildren   | prospect_CreditRating   | prospect_NumberCars   | prospect_AddressLine2   | prospect_PostalCode   | prospect_Gender   | prospect_NumberCreditCards   | prospect_FirstName   |   prospect_Income | prospect_Phone   | prospect_AddressLine1   | prospect_MiddleInitial   | prospect_City   | prospect_MaritalStatus   | prospect_Age   | prospect_OwnOrRentFlag   |   prospect_NetWorth |
|:--------------------|:-------------------------|:--------------------------|:------------------------|:----------------------|:------------------------|:----------------------|:------------------|:-----------------------------|:---------------------|------------------:|:-----------------|:------------------------|:-------------------------|:----------------|:-------------------------|:---------------|:-------------------------|--------------------:|
| PEL0                | Brink's                  | 3.0                       | 760.0                   |                       |                         | T6b 1i1               | f                 |                              | Netti                |            368776 | 1-712-522-6088   | 21847 olympia street    |                          | Fairbanks       | W                        | 20.0           | O                        |         1.05887e+06 |
| LED1                |                          | 1.0                       | 555.0                   | 5.0                   | APT. 624                | 77281                 | F                 | 6.0                          | TRUDY                |            177967 | 1-626-426-4298   | 245 congress court      |                          | Quebec          | U                        | 3.0            | U                        |         1.98818e+06 |
| lat2                |                          | 1.0                       | 566.0                   | 2.0                   |                         | 91355                 |                   | 6.0                          | ireland              |            321772 | 1-524-787-8784   | 6517 frailing west      |                          | Henderson       | S                        |                | O                        |         3.67313e+06 |
| RUD3                | Air Products & Chemicals | 1.0                       |                         | 2.0                   |                         | 36615                 |                   | 3.0                          | Misti                |             25449 | 1-741-997-1688   | 11449 blalock park      |                          | Salem           | W                        | 77.0           | O                        |         2.0059e+06  |
| JAY4                | Oshkosh                  | 3.0                       | 815.0                   | 0.0                   | Apt. 619                | t6a 1i3               | f                 | 4.0                          | sarena               |            166567 | 1-002-194-1991   | 18354 dodd court        | M                        | Toledo          | M                        | 21.0           | O                        |    624736           |
| tod5                |                          | 4.0                       | 333.0                   | 1.0                   |                         | A2b 1v3               | M                 | 10.0                         | Paulette             |             43631 | 1-441-371-7651   | 14117 roxboro street    | Z                        | Corpus Christi  | M                        | 77.0           | R                        |         3.06462e+06 |
| Kan6                | VeraSun Energy           | 0.0                       | 528.0                   | 4.0                   |                         | 49513                 | m                 | 1.0                          | AMALITA              |            466230 | 1-957-940-5980   | 24697 FLORENCE WEST     | R                        | Salt Lake City  |                          | 23.0           | O                        |         3.48913e+06 |
| Din7                | IDT                      | 2.0                       | 680.0                   | 2.0                   |                         | M5d 1v6               |                   | 7.0                          | Ernesto              |            420243 | 1-768-633-4096   | 6488 applewood drive    | Z                        | Brownsville     | M                        | 9.0            | U                        |         3.43074e+06 |
| Thi8                | Adams Resources & Energy |                           | 761.0                   | 3.0                   |                         | V6c 1q1               |                   | 10.0                         | Toby                 |            141862 | 1-107-689-2155   | 17404 gale court        |                          | Escondido       | U                        | 63.0           | O                        |         1.74361e+06 |
| May9                | MGIC Investment          | 2.0                       | 416.0                   | 0.0                   |                         | 99716                 |                   |                              | evangelia            |            402011 | 1-173-594-6096   | 15913 alexis street     |                          | Los Angeles     | M                        | 32.0           | O                        |    216299           |



source_headers: AgencyID
Employer
NumberChildren
CreditRating
NumberCars
AddressLine2
PostalCode
Gender
NumberCreditCards
FirstName
Income
Phone
AddressLine1
MiddleInitial
City
target_headers: prospect_AgencyID
prospect_Employer
prospect_NumberChildren
prospect_CreditRating
prospect_NumberCars
prospect_AddressLine2
prospect_PostalCode
prospect_Gender
prospect_NumberCreditCards
prospect_FirstName
prospect_Income
prospect_Phone
prospect_AddressLine1
prospect_MiddleInitial
prospect_City
column_mappings: AgencyID
prospect_AgencyID
Employer
prospect_Employer
NumberChildren
prospect_NumberChildren
CreditRating
prospect_CreditRating
NumberCars
prospect_NumberCars
AddressLine2
prospect_AddressLine2
PostalCode
prospect_PostalCode
Gender
prospect_Gender
NumberCreditCards
prospect_NumberCreditCards
FirstName
prospect_FirstName
Income
prospect_Income
Phone
prospect_Phone
AddressLine1
prospect_AddressLine1
MiddleInitial
prospect_MiddleInitial
City
prospect_City
output: {"column_mappings": [["AgencyID", "prospect_AgencyID"], ["Employer", "prospect_Employer"], ["NumberChildren", "prospect_NumberChildren"], ["CreditRating", "prospect_CreditRating"], ["NumberCars", "prospect_NumberCars"], ["AddressLine2", "prospect_AddressLine2"], ["PostalCode", "prospect_PostalCode"], ["Gender", "prospect_Gender"], ["NumberCreditCards", "prospect_NumberCreditCards"], ["FirstName", "prospect_FirstName"], ["Income", "prospect_Income"], ["Phone", "prospect_Phone"], ["AddressLine1", "prospect_AddressLine1"], ["MiddleInitial", "prospect_MiddleInitial"], ["City", "prospect_City"], ["LastName", null], ["State", null], ["Country", null]]}