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   | NumberCreditCards   | CreditRating   | Employer                 |         NetWorth | LastName   | FirstName   | MiddleInitial   | Gender   | AddressLine1         | AddressLine2   | PostalCode   | City           | State                |
|:-----------|:--------------------|:---------------|:-------------------------|-----------------:|:-----------|:------------|:----------------|:---------|:---------------------|:---------------|:-------------|:---------------|:---------------------|
| PEL0       |                     | 760.0          | Brink's                  |      1.05887e+06 | PELLAND    | Netti       |                 | f        | 21847 olympia street |                | T6b 1i1      | Fairbanks      | MA                   |
| LED1       | 6.0                 | 555.0          |                          |      1.98818e+06 | LEDUC      | TRUDY       |                 | F        | 245 congress court   | APT. 624       | 77281        | Quebec         | PA                   |
| lat2       | 6.0                 | 566.0          |                          |      3.67313e+06 | latif      | ireland     |                 |          | 6517 frailing west   |                | 91355        | Henderson      | Alberta              |
| RUD3       | 3.0                 |                | Air Products & Chemicals |      2.0059e+06  | RUDDICK    | Misti       |                 |          | 11449 blalock park   |                | 36615        | Salem          | AR                   |
| JAY4       | 4.0                 | 815.0          | Oshkosh                  | 624736           | JAYAMANNE  | sarena      | M               | f        | 18354 dodd court     | Apt. 619       | t6a 1i3      | Toledo         | OR                   |
| tod5       | 10.0                | 333.0          |                          |      3.06462e+06 | todo       | Paulette    | Z               | M        | 14117 roxboro street |                | A2b 1v3      | Corpus Christi | VA                   |
| Kan6       | 1.0                 | 528.0          | VeraSun Energy           |      3.48913e+06 | Kanno      | AMALITA     | R               | m        | 24697 FLORENCE WEST  |                | 49513        | Salt Lake City | OH                   |
| Din7       | 7.0                 | 680.0          | IDT                      |      3.43074e+06 | Dinkel     | Ernesto     | Z               |          | 6488 applewood drive |                | M5d 1v6      | Brownsville    | Prince Edward Island |
| Thi8       | 10.0                | 761.0          | Adams Resources & Energy |      1.74361e+06 | Thibodeaux | Toby        |                 |          | 17404 gale court     |                | V6c 1q1      | Escondido      | NV                   |
| May9       |                     | 416.0          | MGIC Investment          | 216299           | Mayo       | evangelia   |                 |          | 15913 alexis street  |                | 99716        | Los Angeles    | Ontario              |

TableB:
| prospect_AgencyID   | prospect_NumberCreditCards   |   prospect_CreditRating | prospect_Employer              |   prospect_NetWorth | prospect_LastName             | prospect_Country         | prospect_Phone   |   prospect_Income |   prospect_NumberCars | prospect_NumberChildren   | prospect_MaritalStatus   |   prospect_Age | prospect_OwnOrRentFlag   |
|:--------------------|:-----------------------------|------------------------:|:-------------------------------|--------------------:|:------------------------------|:-------------------------|:-----------------|------------------:|----------------------:|:--------------------------|:-------------------------|---------------:|:-------------------------|
| Iok7501             |                              |                     580 | FM Global                      |    321776           | Iokwiqojocjanndatkdzgymym     | United States of America | 1-637-119-9996   |             94490 |                     3 |                           | U                        |              7 | U                        |
| tia7502             | 2.0                          |                     683 | MGIC Investment                |         2.29232e+06 | tiabxgseasiibxakctfzhfwotp    | Canada                   | 1-560-405-0048   |              7037 |                     4 | 4.0                       | S                        |             48 | R                        |
| AOI7503             | 2.0                          |                     411 | Ross Stores                    |    969707           | AOIWIWTIHIXOJ                 |                          | 1-261-306-5079   |            419269 |                     1 | 5.0                       | M                        |             14 | O                        |
| PJQ7504             | 9.0                          |                     818 |                                |         3.89946e+06 | PJQSPMBUHYQKBOZ               | United States of America | 1-642-299-6655   |             76681 |                     4 | 5.0                       | W                        |             29 | U                        |
| SDV7505             | 7.0                          |                     370 | Alliance One International     |         3.74922e+06 | SDVLJWXENNGWCQMIW             | United States of America |                  |            209116 |                     2 | 4.0                       | U                        |             69 | R                        |
| Hga7506             | 6.0                          |                     833 | Sally Beauty Holdings          |         3.65853e+06 | Hgakmykzeunwkiaxayulpwyxrcuev |                          | 1-388-257-4273   |            212203 |                     0 | 0.0                       | U                        |             47 | O                        |
| Beo7507             | 2.0                          |                     536 | Wisconsin Energy               |         1.73846e+06 | Beotomyndkiqryllkvpavllytov   | Canada                   |                  |             42018 |                     5 | 5.0                       | M                        |              0 | U                        |
| Qum7508             | 0.0                          |                     775 | Carpenter Technology           |         3.3073e+06  | Qumxrssnd                     | United States of America | 1-632-118-1891   |             90446 |                     0 | 0.0                       | S                        |             46 | R                        |
| Hud7509             | 3.0                          |                     765 | Liberty Mutual Insurance Group |         1.81642e+06 | Hudlpfwjagzbnznyhamjkhbf      | United States of America | 1-853-806-4986   |             16274 |                     1 | 1.0                       | M                        |              6 | R                        |
| jba7510             | 6.0                          |                     555 | Black & Decker                 |         2.59925e+06 | jbabemsfwdyeihxq              | Canada                   | 1-220-687-2027   |             22215 |                     5 | 2.0                       | M                        |             22 | O                        |



source_headers: AgencyID
NumberCreditCards
CreditRating
Employer
NetWorth
LastName
target_headers: prospect_AgencyID
prospect_NumberCreditCards
prospect_CreditRating
prospect_Employer
prospect_NetWorth
prospect_LastName
column_mappings: AgencyID
prospect_AgencyID
NumberCreditCards
prospect_NumberCreditCards
CreditRating
prospect_CreditRating
Employer
prospect_Employer
NetWorth
prospect_NetWorth
LastName
prospect_LastName
output: {"column_mappings": [["AgencyID", "prospect_AgencyID"], ["NumberCreditCards", "prospect_NumberCreditCards"], ["CreditRating", "prospect_CreditRating"], ["Employer", "prospect_Employer"], ["NetWorth", "prospect_NetWorth"], ["LastName", "prospect_LastName"], ["FirstName", null], ["MiddleInitial", null], ["Gender", null], ["AddressLine1", null], ["AddressLine2", null], ["PostalCode", null], ["City", null], ["State", null]]}