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   |   Income | FirstName   | AddressLine1       | NumberCreditCards   | Age   | LastName   | MiddleInitial   | Gender   | AddressLine2   | PostalCode   | City           | State                | Country                  |
|:-----------|---------:|:------------|:-------------------|:--------------------|:------|:-----------|:----------------|:---------|:---------------|:-------------|:---------------|:---------------------|:-------------------------|
| PEL0       |   308897 | Nerti       | 21947olyjpiastree4 |                     | 24.0  | PELLAND    |                 | f        |                | T6b 1i1      | Fairbanks      | MA                   | United States of America |
| LED1       |   213640 | TRUDh       | 2e5congrssdcourt   | 4.0                 | 18.0  | LEDUC      |                 | F        | APT. 624       | 77281        | Quebec         | PA                   | United States of America |
| lat2       |   213416 | ideland     | 6517brailibgwes6   | 3.0                 |       | latif      |                 |          |                | 91355        | Henderson      | Alberta              | United States of America |
| RUD3       |   185642 | Mksti       | 114e9blakockpqrk   | 5.0                 | 64.0  | RUDDICK    |                 |          |                | 36615        | Salem          | AR                   | Canada                   |
| JAY4       |    85701 | ssrena      | 18354voddfourt     | 3.0                 | 75.0  | JAYAMANNE  | M               | f        | Apt. 619       | t6a 1i3      | Toledo         | OR                   | Canada                   |
| tod5       |   205411 | Paule5te    | q4117rodbkrostreet | 0.0                 | 53.0  | todo       | Z               | M        |                | A2b 1v3      | Corpus Christi | VA                   | United States of America |
| Kan6       |    20656 | AMwLITA     | 24697Fk9RENCEWfST  | 4.0                 | 86.0  | Kanno      | R               | m        |                | 49513        | Salt Lake City | OH                   | Canada                   |
| Din7       |   542965 | Ernes5o     | 6488zpplewkoddriv4 | 3.0                 | 57.0  | Dinkel     | Z               |          |                | M5d 1v6      | Brownsville    | Prince Edward Island | United States of America |
| Thi8       |   299531 | Toby        | 17404raldcourt     | 3.0                 | 55.0  | Thibodeaux |                 |          |                | V6c 1q1      | Escondido      | NV                   | United States of America |
| May9       |    39567 | fvangelia   | 15813aldxisstre3t  |                     | 63.0  | Mayo       |                 |          |                | 99716        | Los Angeles    | Ontario              | United States of America |

TableB:
| AgencyID   |   Income | FirstName                   | AddressLine1                                                                | NumberCreditCards   |   Age | Phone          |   NumberCars | NumberChildren   | MaritalStatus   |   CreditRating | OwnOrRentFlag   | Employer                       |         NetWorth |
|:-----------|---------:|:----------------------------|:----------------------------------------------------------------------------|:--------------------|------:|:---------------|-------------:|:-----------------|:----------------|---------------:|:----------------|:-------------------------------|-----------------:|
| Iok7501    |    94490 | wbwsqgtaa                   | jsurlejkapodmkaccruslfkcqmbcquahsyweopxdxknl                                |                     |     7 | 1-637-119-9996 |            3 |                  | U               |            580 | U               | FM Global                      | 321776           |
| tia7502    |     7037 | QGJWCPAPZMWHYHZTNOYSSOQBI   | Ggptcoorkpeeigqzevhwhjdxdfbrmidyxsugikhgmuvvpcptuphjlgmipvhrrsgepibdupa     | 2.0                 |    48 | 1-560-405-0048 |            4 | 4.0              | S               |            683 | R               | MGIC Investment                |      2.29232e+06 |
| AOI7503    |   419269 | BHGXDDPUMBESLQMNEPREPTZNNKM | Gpcvjzlwouagawronludakqiuhbrbpbkkltrnlkoezgwcawpayfsnejpkmisnryphbtztbfemoy | 2.0                 |    14 | 1-261-306-5079 |            1 | 5.0              | M               |            411 | O               | Ross Stores                    | 969707           |
| PJQ7504    |    76681 | Xgnvppcxgfnmawlupgfa        | Yxkhkvrobywpdczvwmjgxvnuduavcpyiuceglhaskahgyxqpqjbdroyojouqkzfwvfpsddisy   | 9.0                 |    29 | 1-642-299-6655 |            4 | 5.0              | W               |            818 | U               |                                |      3.89946e+06 |
| SDV7505    |   209116 | Tfiozpstcftslqtwkgngiiwo    | Ddsarhvraiskwmrddncqwvzkmjmxtgnpbtgyop                                      | 7.0                 |    69 |                |            2 | 4.0              | U               |            370 | R               | Alliance One International     |      3.74922e+06 |
| Hga7506    |   212203 | fbcahlrhhjoslfzqvvwwvhk     | Ajpkrmtlcbdzr                                                               | 6.0                 |    47 | 1-388-257-4273 |            0 | 0.0              | U               |            833 | O               | Sally Beauty Holdings          |      3.65853e+06 |
| Beo7507    |    42018 | Dcgkohfcwyoaxckalqnkrzwq    | PKSTPUXQIRGWSXSKWRAJTTNBAOLQKAAJFAPGWIHBWVCHOXLE                            | 2.0                 |     0 |                |            5 | 5.0              | M               |            536 | U               | Wisconsin Energy               |      1.73846e+06 |
| Qum7508    |    90446 | Vmnmcsinflxxmmifydckncc     | gyhrpdbplficrfirmtavitgpfmhnnhvsuoqwxrulxlqrdqkzshqovucentrxlakgkpwbrgtd    | 0.0                 |    46 | 1-632-118-1891 |            0 | 0.0              | S               |            775 | R               | Carpenter Technology           |      3.3073e+06  |
| Hud7509    |    16274 | Vrkbkkxkddtximspigmlbwzt    | GJTWIDOQOAPDVVULJGOOJBWTTANDJXOCQHWWZAGLGMJQXJOMWFTFVGXIH                   | 3.0                 |     6 | 1-853-806-4986 |            1 | 1.0              | M               |            765 | R               | Liberty Mutual Insurance Group |      1.81642e+06 |
| jba7510    |    22215 | RMWCTFTLSVTMCBI             | Ycltsquohmuugxihqyluhkoy                                                    | 6.0                 |    22 | 1-220-687-2027 |            5 | 2.0              | M               |            555 | O               | Black & Decker                 |      2.59925e+06 |



source_headers: AgencyID
Income
FirstName
AddressLine1
NumberCreditCards
Age
target_headers: AgencyID
Income
FirstName
AddressLine1
NumberCreditCards
Age
column_mappings: AgencyID
AgencyID
Income
Income
FirstName
FirstName
AddressLine1
AddressLine1
NumberCreditCards
NumberCreditCards
Age
Age
output: {"column_mappings": [["AgencyID", "AgencyID"], ["Income", "Income"], ["FirstName", "FirstName"], ["AddressLine1", "AddressLine1"], ["NumberCreditCards", "NumberCreditCards"], ["Age", "Age"], ["LastName", null], ["MiddleInitial", null], ["Gender", null], ["AddressLine2", null], ["PostalCode", null], ["City", null], ["State", null], ["Country", null]]}