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   | NumberChildren   | City          | MiddleInitial   | CreditRating   | Gender   | NumberCars   | LastName   | MaritalStatus   | Employer             | State              | PostalCode   | AddressLine1       |   Income | FirstName   | AddressLine2   | Country                  |
|:-----------|:----------------|:-----------------|:--------------|:----------------|:---------------|:---------|:-------------|:-----------|:----------------|:---------------------|:-------------------|:-------------|:-------------------|---------:|:------------|:---------------|:-------------------------|
| PEL0       | O               | 4.0              | Fairganks     |                 | 305.0          | f        |              | PELLAmD    | W               | Brjnks               | MA                 | T6b1u1       | 21847llympissteeet |   242006 | Netti       |                | United States of America |
| LED1       | U               | 5.0              | Quebed        |                 | 519.0          | F        | 4.0          | LED8C      | U               |                      | PA                 | 77281        | 245xonvressdourt   |   195696 | TRUDY       | APT. 624       | United States of America |
| lat2       | O               | 1.0              | Hendersoh     |                 | 224.0          |          | 2.0          | lafif      | S               |                      | Algerta            | 91355        | 66w7frailingdest   |   140634 | ireland     |                | United States of America |
| RUD3       | O               | 7.0              | Sal4m         |                 |                |          | 5.0          | R8DDICK    | W               | Air9r9ductsChemixalz | AR                 | 36615        | 1w449blaiodkpark   |   335094 | Misti       |                | Canada                   |
| JAY4       | O               | 3.0              | Toledi        | M               | 455.0          | f        | 0.0          | mAYAMANNE  | M               | Oshkpsh              | OR                 | t6x1i3       | 18353dodvcourt     |   324816 | sarena      | Apt. 619       | Canada                   |
| tod5       | R               | 4.0              | CorpysCgristi | Z               | 196.0          | M        | 4.0          | todo       | M               |                      | VA                 | A2b1v4       | w4117roxbprosfreet |   118600 | Paulette    |                | United States of America |
| Kan6       | O               | 4.0              | SaltLaueCihy  | R               | 275.0          | m        | 4.0          | uanno      |                 | V2raShnEnergy        | OH                 | 49513        | 24698FLOREbC4WEST  |   141954 | AMALITA     |                | Canada                   |
| Din7       | U               | 3.0              | Bro3bsville   | Z               | 203.0          |          | 3.0          | Digkel     | M               | IDT                  | Prince4d3qrdIsland | M5r1v6       | u488xpplewoocdrive |   151340 | Ernesto     |                | United States of America |
| Thi8       | O               |                  | Esconrido     |                 | 282.0          |          | 0.0          | Thibod4ayx | U               | AdamsReso6rsewdnergy | NV                 | V6cqq1       | 1ir04galecourt     |     4967 | Toby        |                | United States of America |
| May9       | O               | 4.0              | posAhgeles    |                 | 159.0          |          | 2.0          | Mayo       | M               | MGICIndestmen5       | Ontadio            | 99716        | 1591wal4xissyreet  |   228170 | evangelia   |                | United States of America |

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



source_headers: AgencyID
OwnOrRentFlag
NumberChildren
City
MiddleInitial
CreditRating
Gender
NumberCars
LastName
MaritalStatus
Employer
State
PostalCode
AddressLine1
Income
target_headers: prospect_AgencyID
prospect_OwnOrRentFlag
prospect_NumberChildren
prospect_City
prospect_MiddleInitial
prospect_CreditRating
prospect_Gender
prospect_NumberCars
prospect_LastName
prospect_MaritalStatus
prospect_Employer
prospect_State
prospect_PostalCode
prospect_AddressLine1
prospect_Income
column_mappings: AgencyID
prospect_AgencyID
OwnOrRentFlag
prospect_OwnOrRentFlag
NumberChildren
prospect_NumberChildren
City
prospect_City
MiddleInitial
prospect_MiddleInitial
CreditRating
prospect_CreditRating
Gender
prospect_Gender
NumberCars
prospect_NumberCars
LastName
prospect_LastName
MaritalStatus
prospect_MaritalStatus
Employer
prospect_Employer
State
prospect_State
PostalCode
prospect_PostalCode
AddressLine1
prospect_AddressLine1
Income
prospect_Income
output: {"column_mappings": [["AgencyID", "prospect_AgencyID"], ["OwnOrRentFlag", "prospect_OwnOrRentFlag"], ["NumberChildren", "prospect_NumberChildren"], ["City", "prospect_City"], ["MiddleInitial", "prospect_MiddleInitial"], ["CreditRating", "prospect_CreditRating"], ["Gender", "prospect_Gender"], ["NumberCars", "prospect_NumberCars"], ["LastName", "prospect_LastName"], ["MaritalStatus", "prospect_MaritalStatus"], ["Employer", "prospect_Employer"], ["State", "prospect_State"], ["PostalCode", "prospect_PostalCode"], ["AddressLine1", "prospect_AddressLine1"], ["Income", "prospect_Income"], ["FirstName", null], ["AddressLine2", null], ["Country", null]]}