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   | Country                  | Gender   | FirstName   | MiddleInitial   |   Income | Age   | LastName   | State                | NumberCreditCards   |         NetWorth | AddressLine1         | AddressLine2   | PostalCode   | City           | Phone          |
|:-----------|:-------------------------|:---------|:------------|:----------------|---------:|:------|:-----------|:---------------------|:--------------------|-----------------:|:---------------------|:---------------|:-------------|:---------------|:---------------|
| PEL0       | United States of America | f        | Netti       |                 |   368776 | 20.0  | PELLAND    | MA                   |                     |      1.05887e+06 | 21847 olympia street |                | T6b 1i1      | Fairbanks      | 1-712-522-6088 |
| LED1       | United States of America | F        | TRUDY       |                 |   177967 | 3.0   | LEDUC      | PA                   | 6.0                 |      1.98818e+06 | 245 congress court   | APT. 624       | 77281        | Quebec         | 1-626-426-4298 |
| lat2       | United States of America |          | ireland     |                 |   321772 |       | latif      | Alberta              | 6.0                 |      3.67313e+06 | 6517 frailing west   |                | 91355        | Henderson      | 1-524-787-8784 |
| RUD3       | Canada                   |          | Misti       |                 |    25449 | 77.0  | RUDDICK    | AR                   | 3.0                 |      2.0059e+06  | 11449 blalock park   |                | 36615        | Salem          | 1-741-997-1688 |
| JAY4       | Canada                   | f        | sarena      | M               |   166567 | 21.0  | JAYAMANNE  | OR                   | 4.0                 | 624736           | 18354 dodd court     | Apt. 619       | t6a 1i3      | Toledo         | 1-002-194-1991 |
| tod5       | United States of America | M        | Paulette    | Z               |    43631 | 77.0  | todo       | VA                   | 10.0                |      3.06462e+06 | 14117 roxboro street |                | A2b 1v3      | Corpus Christi | 1-441-371-7651 |
| Kan6       | Canada                   | m        | AMALITA     | R               |   466230 | 23.0  | Kanno      | OH                   | 1.0                 |      3.48913e+06 | 24697 FLORENCE WEST  |                | 49513        | Salt Lake City | 1-957-940-5980 |
| Din7       | United States of America |          | Ernesto     | Z               |   420243 | 9.0   | Dinkel     | Prince Edward Island | 7.0                 |      3.43074e+06 | 6488 applewood drive |                | M5d 1v6      | Brownsville    | 1-768-633-4096 |
| Thi8       | United States of America |          | Toby        |                 |   141862 | 63.0  | Thibodeaux | NV                   | 10.0                |      1.74361e+06 | 17404 gale court     |                | V6c 1q1      | Escondido      | 1-107-689-2155 |
| May9       | United States of America |          | evangelia   |                 |   402011 | 32.0  | Mayo       | Ontario              |                     | 216299           | 15913 alexis street  |                | 99716        | Los Angeles    | 1-173-594-6096 |

TableB:
| prospect_AgencyID   | prospect_Country         | prospect_Gender   | prospect_FirstName          | prospect_MiddleInitial   |   prospect_Income |   prospect_Age | prospect_LastName             | prospect_State   | prospect_NumberCreditCards   |   prospect_NetWorth |   prospect_NumberCars | prospect_NumberChildren   | prospect_MaritalStatus   |   prospect_CreditRating | prospect_OwnOrRentFlag   | prospect_Employer              |
|:--------------------|:-------------------------|:------------------|:----------------------------|:-------------------------|------------------:|---------------:|:------------------------------|:-----------------|:-----------------------------|--------------------:|----------------------:|:--------------------------|:-------------------------|------------------------:|:-------------------------|:-------------------------------|
| Iok7501             | United States of America |                   | wbwsqgtaa                   | n                        |             94490 |              7 | Iokwiqojocjanndatkdzgymym     | MO               |                              |    321776           |                     3 |                           | U                        |                     580 | U                        | FM Global                      |
| tia7502             | Canada                   | M                 | QGJWCPAPZMWHYHZTNOYSSOQBI   |                          |              7037 |             48 | tiabxgseasiibxakctfzhfwotp    | TX               | 2.0                          |         2.29232e+06 |                     4 | 4.0                       | S                        |                     683 | R                        | MGIC Investment                |
| AOI7503             |                          |                   | BHGXDDPUMBESLQMNEPREPTZNNKM | u                        |            419269 |             14 | AOIWIWTIHIXOJ                 | CT               | 2.0                          |    969707           |                     1 | 5.0                       | M                        |                     411 | O                        | Ross Stores                    |
| PJQ7504             | United States of America | m                 | Xgnvppcxgfnmawlupgfa        |                          |             76681 |             29 | PJQSPMBUHYQKBOZ               | UT               | 9.0                          |         3.89946e+06 |                     4 | 5.0                       | W                        |                     818 | U                        |                                |
| SDV7505             | United States of America |                   | Tfiozpstcftslqtwkgngiiwo    |                          |            209116 |             69 | SDVLJWXENNGWCQMIW             | RI               | 7.0                          |         3.74922e+06 |                     2 | 4.0                       | U                        |                     370 | R                        | Alliance One International     |
| Hga7506             |                          | F                 | fbcahlrhhjoslfzqvvwwvhk     | F                        |            212203 |             47 | Hgakmykzeunwkiaxayulpwyxrcuev | DE               | 6.0                          |         3.65853e+06 |                     0 | 0.0                       | U                        |                     833 | O                        | Sally Beauty Holdings          |
| Beo7507             | Canada                   | M                 | Dcgkohfcwyoaxckalqnkrzwq    | D                        |             42018 |              0 | Beotomyndkiqryllkvpavllytov   | NM               | 2.0                          |         1.73846e+06 |                     5 | 5.0                       | M                        |                     536 | U                        | Wisconsin Energy               |
| Qum7508             | United States of America |                   | Vmnmcsinflxxmmifydckncc     |                          |             90446 |             46 | Qumxrssnd                     | WV               | 0.0                          |         3.3073e+06  |                     0 | 0.0                       | S                        |                     775 | R                        | Carpenter Technology           |
| Hud7509             | United States of America |                   | Vrkbkkxkddtximspigmlbwzt    | v                        |             16274 |              6 | Hudlpfwjagzbnznyhamjkhbf      | NH               | 3.0                          |         1.81642e+06 |                     1 | 1.0                       | M                        |                     765 | R                        | Liberty Mutual Insurance Group |
| jba7510             | Canada                   | m                 | RMWCTFTLSVTMCBI             |                          |             22215 |             22 | jbabemsfwdyeihxq              | WY               | 6.0                          |         2.59925e+06 |                     5 | 2.0                       | M                        |                     555 | O                        | Black & Decker                 |



source_headers: AgencyID
Country
Gender
FirstName
MiddleInitial
Income
Age
LastName
State
NumberCreditCards
NetWorth
target_headers: prospect_AgencyID
prospect_Country
prospect_Gender
prospect_FirstName
prospect_MiddleInitial
prospect_Income
prospect_Age
prospect_LastName
prospect_State
prospect_NumberCreditCards
prospect_NetWorth
column_mappings: AgencyID
prospect_AgencyID
Country
prospect_Country
Gender
prospect_Gender
FirstName
prospect_FirstName
MiddleInitial
prospect_MiddleInitial
Income
prospect_Income
Age
prospect_Age
LastName
prospect_LastName
State
prospect_State
NumberCreditCards
prospect_NumberCreditCards
NetWorth
prospect_NetWorth
output: {"column_mappings": [["AgencyID", "prospect_AgencyID"], ["Country", "prospect_Country"], ["Gender", "prospect_Gender"], ["FirstName", "prospect_FirstName"], ["MiddleInitial", "prospect_MiddleInitial"], ["Income", "prospect_Income"], ["Age", "prospect_Age"], ["LastName", "prospect_LastName"], ["State", "prospect_State"], ["NumberCreditCards", "prospect_NumberCreditCards"], ["NetWorth", "prospect_NetWorth"], ["AddressLine1", null], ["AddressLine2", null], ["PostalCode", null], ["City", null], ["Phone", null]]}