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 | City          | AddressLine1       | NumberCreditCards   | PostalCode   | LastName   | FirstName   | MiddleInitial   | Gender   | AddressLine2   | State                | Country                  | Phone          |
|:-----------|---------:|:--------------|:-------------------|:--------------------|:-------------|:-----------|:------------|:----------------|:---------|:---------------|:---------------------|:-------------------------|:---------------|
| PEL0       |   327744 | Fajrbanks     | 2w847olympiasrdeet |                     | T6b1u1       | PELLAND    | Netti       |                 | f        |                | MA                   | United States of America | 1-712-522-6088 |
| LED1       |   292554 | Quebef        | 245dontrdsscourt   | 6.0                 | 77281        | LEDUC      | TRUDY       |                 | F        | APT. 624       | PA                   | United States of America | 1-626-426-4298 |
| lat2       |   419493 | Henders9n     | t517fdailingw2st   | 9.0                 | 91355        | latif      | ireland     |                 |          |                | Alberta              | United States of America | 1-524-787-8784 |
| RUD3       |   122158 | aalem         | 12459blalockparj   | 4.0                 | 36615        | RUDDICK    | Misti       |                 |          |                | AR                   | Canada                   | 1-741-997-1688 |
| JAY4       |   237734 | Tlledo        | 18354dodfc8urt     | 0.0                 | t6awi3       | JAYAMANNE  | sarena      | M               | f        | Apt. 619       | OR                   | Canada                   | 1-002-194-1991 |
| tod5       |   359700 | CorpusChrusgi | q4117roxvorostredt | 4.0                 | s2b1v3       | todo       | Paulette    | Z               | M        |                | VA                   | United States of America | 1-441-371-7651 |
| Kan6       |   127778 | SaphLakeCity  | 2479uFLORENCEaEST  | 4.0                 | 49513        | Kanno      | AMALITA     | R               | m        |                | OH                   | Canada                   | 1-957-940-5980 |
| Din7       |   347818 | Br0wncville   | 6489applewo0ddrige | 6.0                 | M5d1d6       | Dinkel     | Ernesto     | Z               |          |                | Prince Edward Island | United States of America | 1-768-633-4096 |
| Thi8       |    77110 | Esc0ndido     | 17404gslecoyrt     | 6.0                 | V6cqq1       | Thibodeaux | Toby        |                 |          |                | NV                   | United States of America | 1-107-689-2155 |
| May9       |   200504 | oosAngelfs    | 14913aoexisstree5  |                     | 99716        | Mayo       | evangelia   |                 |          |                | Ontario              | United States of America | 1-173-594-6096 |

TableB:
| AgencyID   |   Income | City       | AddressLine1                                                                | NumberCreditCards   | PostalCode   |   NumberCars | NumberChildren   | MaritalStatus   |   Age |   CreditRating | OwnOrRentFlag   | Employer                       |         NetWorth |
|:-----------|---------:|:-----------|:----------------------------------------------------------------------------|:--------------------|:-------------|-------------:|:-----------------|:----------------|------:|---------------:|:----------------|:-------------------------------|-----------------:|
| Iok7501    |    94490 | Baltimore  | jsurlejkapodmkaccruslfkcqmbcquahsyweopxdxknl                                |                     | Guudshirvcu  |            3 |                  | U               |     7 |            580 | U               | FM Global                      | 321776           |
| tia7502    |     7037 | Kitchener  | Ggptcoorkpeeigqzevhwhjdxdfbrmidyxsugikhgmuvvpcptuphjlgmipvhrrsgepibdupa     | 2.0                 | wyggjewbe    |            4 | 4.0              | S               |    48 |            683 | R               | MGIC Investment                |      2.29232e+06 |
| AOI7503    |   419269 | Saint John | Gpcvjzlwouagawronludakqiuhbrbpbkkltrnlkoezgwcawpayfsnejpkmisnryphbtztbfemoy | 2.0                 | YMZRQICUTHT  |            1 | 5.0              | M               |    14 |            411 | O               | Ross Stores                    | 969707           |
| PJQ7504    |    76681 | Berkeley   | Yxkhkvrobywpdczvwmjgxvnuduavcpyiuceglhaskahgyxqpqjbdroyojouqkzfwvfpsddisy   | 9.0                 | Bcjuycmcen   |            4 | 5.0              | W               |    29 |            818 | U               |                                |      3.89946e+06 |
| SDV7505    |   209116 | Missoula   | Ddsarhvraiskwmrddncqwvzkmjmxtgnpbtgyop                                      | 7.0                 | Nujxguyehf   |            2 | 4.0              | U               |    69 |            370 | R               | Alliance One International     |      3.74922e+06 |
| Hga7506    |   212203 | Salinas    | Ajpkrmtlcbdzr                                                               | 6.0                 | Neigswk      |            0 | 0.0              | U               |    47 |            833 | O               | Sally Beauty Holdings          |      3.65853e+06 |
| Beo7507    |    42018 | San Jose   | PKSTPUXQIRGWSXSKWRAJTTNBAOLQKAAJFAPGWIHBWVCHOXLE                            | 2.0                 | WNCEOQPLW    |            5 | 5.0              | M               |     0 |            536 | U               | Wisconsin Energy               |      1.73846e+06 |
| Qum7508    |    90446 | Cleveland  | gyhrpdbplficrfirmtavitgpfmhnnhvsuoqwxrulxlqrdqkzshqovucentrxlakgkpwbrgtd    | 0.0                 | Cskdwtkf     |            0 | 0.0              | S               |    46 |            775 | R               | Carpenter Technology           |      3.3073e+06  |
| Hud7509    |    16274 | Huntington | GJTWIDOQOAPDVVULJGOOJBWTTANDJXOCQHWWZAGLGMJQXJOMWFTFVGXIH                   | 3.0                 | tcxswloetdt  |            1 | 1.0              | M               |     6 |            765 | R               | Liberty Mutual Insurance Group |      1.81642e+06 |
| jba7510    |    22215 | Paterson   | Ycltsquohmuugxihqyluhkoy                                                    | 6.0                 | Fkpemasoukih |            5 | 2.0              | M               |    22 |            555 | O               | Black & Decker                 |      2.59925e+06 |



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