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   | MiddleInitial   | PostalCode   | NumberCreditCards   | MaritalStatus   | Employer             | LastName   | FirstName   | Gender   | AddressLine1         | AddressLine2   | City           | State                | Country                  |
|:-----------|:----------------|:-------------|:--------------------|:----------------|:---------------------|:-----------|:------------|:---------|:---------------------|:---------------|:---------------|:---------------------|:-------------------------|
| PEL0       |                 | r6b1i1       |                     | W               | hrinks               | PELLAND    | Netti       | f        | 21847 olympia street |                | Fairbanks      | MA                   | United States of America |
| LED1       |                 | 77281        | 0.0                 | U               |                      | LEDUC      | TRUDY       | F        | 245 congress court   | APT. 624       | Quebec         | PA                   | United States of America |
| lat2       |                 | 91355        | 3.0                 | S               |                      | latif      | ireland     |          | 6517 frailing west   |                | Henderson      | Alberta              | United States of America |
| RUD3       |                 | 36615        | 2.0                 | W               | AirProd8ctsxhemifaos | RUDDICK    | Misti       |          | 11449 blalock park   |                | Salem          | AR                   | Canada                   |
| JAY4       | M               | r6a1i3       | 6.0                 | M               | 8shkosh              | JAYAMANNE  | sarena      | f        | 18354 dodd court     | Apt. 619       | Toledo         | OR                   | Canada                   |
| tod5       | Z               | A3b1v3       | 8.0                 | M               |                      | todo       | Paulette    | M        | 14117 roxboro street |                | Corpus Christi | VA                   | United States of America |
| Kan6       | R               | 49513        | 3.0                 |                 | Ve5aSunEnwrgy        | Kanno      | AMALITA     | m        | 24697 FLORENCE WEST  |                | Salt Lake City | OH                   | Canada                   |
| Din7       | Z               | M5dwv6       | 6.0                 | M               | IDT                  | Dinkel     | Ernesto     |          | 6488 applewood drive |                | Brownsville    | Prince Edward Island | United States of America |
| Thi8       |                 | V6c121       | 4.0                 | U               | AdamsReqoueceeEgergy | Thibodeaux | Toby        |          | 17404 gale court     |                | Escondido      | NV                   | United States of America |
| May9       |                 | 99716        |                     | M               | MnICIngestment       | Mayo       | evangelia   |          | 15913 alexis street  |                | Los Angeles    | Ontario              | United States of America |

TableB:
| prospect_AgeID   | prospect_MidInit   | prospect_PoCo   | prospect_NuCreCa   | prospect_MariSta   | prospect_Em                    | prospect_Ph    |   prospect_In |   prospect_NuC | prospect_NumCh   |   prospect_A |   prospect_CreRa | prospect_OORF   |   prospect_NeWor |
|:-----------------|:-------------------|:----------------|:-------------------|:-------------------|:-------------------------------|:---------------|--------------:|---------------:|:-----------------|-------------:|-----------------:|:----------------|-----------------:|
| Iok7501          | n                  | Guudshirvcu     |                    | U                  | FM Global                      | 1-637-119-9996 |         94490 |              3 |                  |            7 |              580 | U               | 321776           |
| tia7502          |                    | wyggjewbe       | 2.0                | S                  | MGIC Investment                | 1-560-405-0048 |          7037 |              4 | 4.0              |           48 |              683 | R               |      2.29232e+06 |
| AOI7503          | u                  | YMZRQICUTHT     | 2.0                | M                  | Ross Stores                    | 1-261-306-5079 |        419269 |              1 | 5.0              |           14 |              411 | O               | 969707           |
| PJQ7504          |                    | Bcjuycmcen      | 9.0                | W                  |                                | 1-642-299-6655 |         76681 |              4 | 5.0              |           29 |              818 | U               |      3.89946e+06 |
| SDV7505          |                    | Nujxguyehf      | 7.0                | U                  | Alliance One International     |                |        209116 |              2 | 4.0              |           69 |              370 | R               |      3.74922e+06 |
| Hga7506          | F                  | Neigswk         | 6.0                | U                  | Sally Beauty Holdings          | 1-388-257-4273 |        212203 |              0 | 0.0              |           47 |              833 | O               |      3.65853e+06 |
| Beo7507          | D                  | WNCEOQPLW       | 2.0                | M                  | Wisconsin Energy               |                |         42018 |              5 | 5.0              |            0 |              536 | U               |      1.73846e+06 |
| Qum7508          |                    | Cskdwtkf        | 0.0                | S                  | Carpenter Technology           | 1-632-118-1891 |         90446 |              0 | 0.0              |           46 |              775 | R               |      3.3073e+06  |
| Hud7509          | v                  | tcxswloetdt     | 3.0                | M                  | Liberty Mutual Insurance Group | 1-853-806-4986 |         16274 |              1 | 1.0              |            6 |              765 | R               |      1.81642e+06 |
| jba7510          |                    | Fkpemasoukih    | 6.0                | M                  | Black & Decker                 | 1-220-687-2027 |         22215 |              5 | 2.0              |           22 |              555 | O               |      2.59925e+06 |



source_headers: AgencyID
MiddleInitial
PostalCode
NumberCreditCards
MaritalStatus
Employer
target_headers: prospect_AgeID
prospect_MidInit
prospect_PoCo
prospect_NuCreCa
prospect_MariSta
prospect_Em
column_mappings: AgencyID
prospect_AgeID
MiddleInitial
prospect_MidInit
PostalCode
prospect_PoCo
NumberCreditCards
prospect_NuCreCa
MaritalStatus
prospect_MariSta
Employer
prospect_Em
output: {"column_mappings": [["AgencyID", "prospect_AgeID"], ["MiddleInitial", "prospect_MidInit"], ["PostalCode", "prospect_PoCo"], ["NumberCreditCards", "prospect_NuCreCa"], ["MaritalStatus", "prospect_MariSta"], ["Employer", "prospect_Em"], ["LastName", null], ["FirstName", null], ["Gender", null], ["AddressLine1", null], ["AddressLine2", null], ["City", null], ["State", null], ["Country", null]]}