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   | AddressLine2   | AddressLine1       | OwnOrRentFlag   | NumberCreditCards   | State              | Gender   | MiddleInitial   | Age   | Phone          | Employer             | LastName   | FirstName   | PostalCode   | City           | Country                  |
|:-----------|:---------------|:-------------------|:----------------|:--------------------|:-------------------|:---------|:----------------|:------|:---------------|:---------------------|:-----------|:------------|:-------------|:---------------|:-------------------------|
| PEL0       |                | 2q84iolympiqstreet | O               |                     | MA                 | f        |                 | 1.0   | 1 712 522 6088 | Brinus               | PELLAND    | Netti       | T6b 1i1      | Fairbanks      | United States of America |
| LED1       | APT524         | 245clngreswxourt   | U               | 8.0                 | PA                 | F        |                 | 39.0  | 1 626 426 4298 |                      | LEDUC      | TRUDY       | 77281        | Quebec         | United States of America |
| lat2       |                | 6417fra7liggwest   | O               | 5.0                 | Albetta            |          |                 |       | 1 524 787 8784 |                      | latif      | ireland     | 91355        | Henderson      | United States of America |
| RUD3       |                | 21449bialockparu   | O               | 3.0                 | AR                 |          |                 | 51.0  | 1 741 997 1688 | AirorodusgdChemicals | RUDDICK    | Misti       | 36615        | Salem          | Canada                   |
| JAY4       | Apy619         | 18w5rdoddcourt     | O               | 3.0                 | OR                 | f        | M               | 27.0  | 1 002 194 1991 | Oshkoeh              | JAYAMANNE  | sarena      | t6a 1i3      | Toledo         | Canada                   |
| tod5       |                | 14w17roxborostre2r | R               | 11.0                | VA                 | M        | Z               | 16.0  | 1 441 371 7651 |                      | todo       | Paulette    | A2b 1v3      | Corpus Christi | United States of America |
| Kan6       |                | 2t697FLiRENC2WEST  | O               | 4.0                 | OH                 | m        | R               | 19.0  | 1 957 940 5980 | VeraSunshergy        | Kanno      | AMALITA     | 49513        | Salt Lake City | Canada                   |
| Din7       |                | 6488appldwooddrib4 | U               | 8.0                 | PrincsEdwaddIslwnd |          | Z               | 27.0  | 1 768 633 4096 | IDT                  | Dinkel     | Ernesto     | M5d 1v6      | Brownsville    | United States of America |
| Thi8       |                | 17404gaiecoirt     | O               | 7.0                 | NV                 |          |                 | 46.0  | 1 107 689 2155 | Adamsdesou3cessneegy | Thibodeaux | Toby        | V6c 1q1      | Escondido      | United States of America |
| May9       |                | 15913slex9sqtreet  | O               |                     | Ojtario            |          |                 | 21.0  | 1 173 594 6096 | MGICInbeatment       | Mayo       | evangelia   | 99716        | Los Angeles    | United States of America |

TableB:
| prospect_AgencyID   | prospect_AddressLine2   | prospect_AddressLine1   | prospect_OwnOrRentFlag   | prospect_NumberCreditCards   | prospect_State       | prospect_Gender   | prospect_MiddleInitial   | prospect_Age   | prospect_Phone   | prospect_Employer        |   prospect_Income | prospect_NumberCars   | prospect_NumberChildren   | prospect_MaritalStatus   | prospect_CreditRating   |   prospect_NetWorth |
|:--------------------|:------------------------|:------------------------|:-------------------------|:-----------------------------|:---------------------|:------------------|:-------------------------|:---------------|:-----------------|:-------------------------|------------------:|:----------------------|:--------------------------|:-------------------------|:------------------------|--------------------:|
| PEL0                |                         | 21847 olympia street    | O                        |                              | MA                   | f                 |                          | 20.0           | 1-712-522-6088   | Brink's                  |            368776 |                       | 3.0                       | W                        | 760.0                   |         1.05887e+06 |
| LED1                | APT. 624                | 245 congress court      | U                        | 6.0                          | PA                   | F                 |                          | 3.0            | 1-626-426-4298   |                          |            177967 | 5.0                   | 1.0                       | U                        | 555.0                   |         1.98818e+06 |
| lat2                |                         | 6517 frailing west      | O                        | 6.0                          | Alberta              |                   |                          |                | 1-524-787-8784   |                          |            321772 | 2.0                   | 1.0                       | S                        | 566.0                   |         3.67313e+06 |
| RUD3                |                         | 11449 blalock park      | O                        | 3.0                          | AR                   |                   |                          | 77.0           | 1-741-997-1688   | Air Products & Chemicals |             25449 | 2.0                   | 1.0                       | W                        |                         |         2.0059e+06  |
| JAY4                | Apt. 619                | 18354 dodd court        | O                        | 4.0                          | OR                   | f                 | M                        | 21.0           | 1-002-194-1991   | Oshkosh                  |            166567 | 0.0                   | 3.0                       | M                        | 815.0                   |    624736           |
| tod5                |                         | 14117 roxboro street    | R                        | 10.0                         | VA                   | M                 | Z                        | 77.0           | 1-441-371-7651   |                          |             43631 | 1.0                   | 4.0                       | M                        | 333.0                   |         3.06462e+06 |
| Kan6                |                         | 24697 FLORENCE WEST     | O                        | 1.0                          | OH                   | m                 | R                        | 23.0           | 1-957-940-5980   | VeraSun Energy           |            466230 | 4.0                   | 0.0                       |                          | 528.0                   |         3.48913e+06 |
| Din7                |                         | 6488 applewood drive    | U                        | 7.0                          | Prince Edward Island |                   | Z                        | 9.0            | 1-768-633-4096   | IDT                      |            420243 | 2.0                   | 2.0                       | M                        | 680.0                   |         3.43074e+06 |
| Thi8                |                         | 17404 gale court        | O                        | 10.0                         | NV                   |                   |                          | 63.0           | 1-107-689-2155   | Adams Resources & Energy |            141862 | 3.0                   |                           | U                        | 761.0                   |         1.74361e+06 |
| May9                |                         | 15913 alexis street     | O                        |                              | Ontario              |                   |                          | 32.0           | 1-173-594-6096   | MGIC Investment          |            402011 | 0.0                   | 2.0                       | M                        | 416.0                   |    216299           |



source_headers: AgencyID
AddressLine2
AddressLine1
OwnOrRentFlag
NumberCreditCards
State
Gender
MiddleInitial
Age
Phone
Employer
target_headers: prospect_AgencyID
prospect_AddressLine2
prospect_AddressLine1
prospect_OwnOrRentFlag
prospect_NumberCreditCards
prospect_State
prospect_Gender
prospect_MiddleInitial
prospect_Age
prospect_Phone
prospect_Employer
column_mappings: AgencyID
prospect_AgencyID
AddressLine2
prospect_AddressLine2
AddressLine1
prospect_AddressLine1
OwnOrRentFlag
prospect_OwnOrRentFlag
NumberCreditCards
prospect_NumberCreditCards
State
prospect_State
Gender
prospect_Gender
MiddleInitial
prospect_MiddleInitial
Age
prospect_Age
Phone
prospect_Phone
Employer
prospect_Employer
output: {"column_mappings": [["AgencyID", "prospect_AgencyID"], ["AddressLine2", "prospect_AddressLine2"], ["AddressLine1", "prospect_AddressLine1"], ["OwnOrRentFlag", "prospect_OwnOrRentFlag"], ["NumberCreditCards", "prospect_NumberCreditCards"], ["State", "prospect_State"], ["Gender", "prospect_Gender"], ["MiddleInitial", "prospect_MiddleInitial"], ["Age", "prospect_Age"], ["Phone", "prospect_Phone"], ["Employer", "prospect_Employer"], ["LastName", null], ["FirstName", null], ["PostalCode", null], ["City", null], ["Country", null]]}