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   | Employer                 | AddressLine2   | Age   |   Income | LastName   | OwnOrRentFlag   | Phone          | MiddleInitial   | MaritalStatus   | Country                  | NumberCars   | AddressLine1         | NumberChildren   | CreditRating   | FirstName   | Gender   | PostalCode   |
|:-----------|:-------------------------|:---------------|:------|---------:|:-----------|:----------------|:---------------|:----------------|:----------------|:-------------------------|:-------------|:---------------------|:-----------------|:---------------|:------------|:---------|:-------------|
| PEL0       | Brink's                  |                | 20.0  |   368776 | PELLAND    | O               | 1-712-522-6088 |                 | W               | United States of America |              | 21847 olympia street | 3.0              | 760.0          | Netti       | f        | T6b 1i1      |
| LED1       |                          | APT. 624       | 3.0   |   177967 | LEDUC      | U               | 1-626-426-4298 |                 | U               | United States of America | 5.0          | 245 congress court   | 1.0              | 555.0          | TRUDY       | F        | 77281        |
| lat2       |                          |                |       |   321772 | latif      | O               | 1-524-787-8784 |                 | S               | United States of America | 2.0          | 6517 frailing west   | 1.0              | 566.0          | ireland     |          | 91355        |
| RUD3       | Air Products & Chemicals |                | 77.0  |    25449 | RUDDICK    | O               | 1-741-997-1688 |                 | W               | Canada                   | 2.0          | 11449 blalock park   | 1.0              |                | Misti       |          | 36615        |
| JAY4       | Oshkosh                  | Apt. 619       | 21.0  |   166567 | JAYAMANNE  | O               | 1-002-194-1991 | M               | M               | Canada                   | 0.0          | 18354 dodd court     | 3.0              | 815.0          | sarena      | f        | t6a 1i3      |
| tod5       |                          |                | 77.0  |    43631 | todo       | R               | 1-441-371-7651 | Z               | M               | United States of America | 1.0          | 14117 roxboro street | 4.0              | 333.0          | Paulette    | M        | A2b 1v3      |
| Kan6       | VeraSun Energy           |                | 23.0  |   466230 | Kanno      | O               | 1-957-940-5980 | R               |                 | Canada                   | 4.0          | 24697 FLORENCE WEST  | 0.0              | 528.0          | AMALITA     | m        | 49513        |
| Din7       | IDT                      |                | 9.0   |   420243 | Dinkel     | U               | 1-768-633-4096 | Z               | M               | United States of America | 2.0          | 6488 applewood drive | 2.0              | 680.0          | Ernesto     |          | M5d 1v6      |
| Thi8       | Adams Resources & Energy |                | 63.0  |   141862 | Thibodeaux | O               | 1-107-689-2155 |                 | U               | United States of America | 3.0          | 17404 gale court     |                  | 761.0          | Toby        |          | V6c 1q1      |
| May9       | MGIC Investment          |                | 32.0  |   402011 | Mayo       | O               | 1-173-594-6096 |                 | M               | United States of America | 0.0          | 15913 alexis street  | 2.0              | 416.0          | evangelia   |          | 99716        |

TableB:
| prospect_AgeID   | prospect_Em                    | prospect_AddLi2                                                   |   prospect_Ag |   prospect_In | prospect_LaN                  | prospect_OwOReFl   | prospect_Ph    | prospect_MidIn   | prospect_MariSt   | prospect_Co              |   prospect_NuCa | prospect_AdLi1                                                              | prospect_NuCh   |   prospect_CreRat | prospect_Ci   | prospect_St   | prospect_NuCreCa   |    prospect_NWor |
|:-----------------|:-------------------------------|:------------------------------------------------------------------|--------------:|--------------:|:------------------------------|:-------------------|:---------------|:-----------------|:------------------|:-------------------------|----------------:|:----------------------------------------------------------------------------|:----------------|------------------:|:--------------|:--------------|:-------------------|-----------------:|
| Iok7501          | FM Global                      | GKOIKEZZMQTPQUQZLSAUUMVBDPAXTWNWSXTYJYQ                           |             7 |         94490 | Iokwiqojocjanndatkdzgymym     | U                  | 1-637-119-9996 | n                | U                 | United States of America |               3 | jsurlejkapodmkaccruslfkcqmbcquahsyweopxdxknl                                |                 |               580 | Baltimore     | MO            |                    | 321776           |
| tia7502          | MGIC Investment                | ocmgcvnexhqhgoyrwpkgaopthdvandlzaaleqccjpjkbirtcqvorobgskhtlgndvn |            48 |          7037 | tiabxgseasiibxakctfzhfwotp    | R                  | 1-560-405-0048 |                  | S                 | Canada                   |               4 | Ggptcoorkpeeigqzevhwhjdxdfbrmidyxsugikhgmuvvpcptuphjlgmipvhrrsgepibdupa     | 4.0             |               683 | Kitchener     | TX            | 2.0                |      2.29232e+06 |
| AOI7503          | Ross Stores                    | Cdrxeolwrrxmwmhgexvcstvzz                                         |            14 |        419269 | AOIWIWTIHIXOJ                 | O                  | 1-261-306-5079 | u                | M                 |                          |               1 | Gpcvjzlwouagawronludakqiuhbrbpbkkltrnlkoezgwcawpayfsnejpkmisnryphbtztbfemoy | 5.0             |               411 | Saint John    | CT            | 2.0                | 969707           |
| PJQ7504          |                                | WKSBVOFGJHQGAEKUYRZHHPH                                           |            29 |         76681 | PJQSPMBUHYQKBOZ               | U                  | 1-642-299-6655 |                  | W                 | United States of America |               4 | Yxkhkvrobywpdczvwmjgxvnuduavcpyiuceglhaskahgyxqpqjbdroyojouqkzfwvfpsddisy   | 5.0             |               818 | Berkeley      | UT            | 9.0                |      3.89946e+06 |
| SDV7505          | Alliance One International     | skxijfqpzshmts                                                    |            69 |        209116 | SDVLJWXENNGWCQMIW             | R                  |                |                  | U                 | United States of America |               2 | Ddsarhvraiskwmrddncqwvzkmjmxtgnpbtgyop                                      | 4.0             |               370 | Missoula      | RI            | 7.0                |      3.74922e+06 |
| Hga7506          | Sally Beauty Holdings          | ZETOHHRKIBHCQCKZODIXJJSXCFY                                       |            47 |        212203 | Hgakmykzeunwkiaxayulpwyxrcuev | O                  | 1-388-257-4273 | F                | U                 |                          |               0 | Ajpkrmtlcbdzr                                                               | 0.0             |               833 | Salinas       | DE            | 6.0                |      3.65853e+06 |
| Beo7507          | Wisconsin Energy               | LJXAXKUJXQBGWBHJJAAM                                              |             0 |         42018 | Beotomyndkiqryllkvpavllytov   | U                  |                | D                | M                 | Canada                   |               5 | PKSTPUXQIRGWSXSKWRAJTTNBAOLQKAAJFAPGWIHBWVCHOXLE                            | 5.0             |               536 | San Jose      | NM            | 2.0                |      1.73846e+06 |
| Qum7508          | Carpenter Technology           | Jmlgjkjbqhrudrkqrm                                                |            46 |         90446 | Qumxrssnd                     | R                  | 1-632-118-1891 |                  | S                 | United States of America |               0 | gyhrpdbplficrfirmtavitgpfmhnnhvsuoqwxrulxlqrdqkzshqovucentrxlakgkpwbrgtd    | 0.0             |               775 | Cleveland     | WV            | 0.0                |      3.3073e+06  |
| Hud7509          | Liberty Mutual Insurance Group | Qqcilgblxyikgr                                                    |             6 |         16274 | Hudlpfwjagzbnznyhamjkhbf      | R                  | 1-853-806-4986 | v                | M                 | United States of America |               1 | GJTWIDOQOAPDVVULJGOOJBWTTANDJXOCQHWWZAGLGMJQXJOMWFTFVGXIH                   | 1.0             |               765 | Huntington    | NH            | 3.0                |      1.81642e+06 |
| jba7510          | Black & Decker                 | Ahtohqjfzfarn                                                     |            22 |         22215 | jbabemsfwdyeihxq              | O                  | 1-220-687-2027 |                  | M                 | Canada                   |               5 | Ycltsquohmuugxihqyluhkoy                                                    | 2.0             |               555 | Paterson      | WY            | 6.0                |      2.59925e+06 |



source_headers: AgencyID
Employer
AddressLine2
Age
Income
LastName
OwnOrRentFlag
Phone
MiddleInitial
MaritalStatus
Country
NumberCars
AddressLine1
NumberChildren
CreditRating
target_headers: prospect_AgeID
prospect_Em
prospect_AddLi2
prospect_Ag
prospect_In
prospect_LaN
prospect_OwOReFl
prospect_Ph
prospect_MidIn
prospect_MariSt
prospect_Co
prospect_NuCa
prospect_AdLi1
prospect_NuCh
prospect_CreRat
column_mappings: AgencyID
prospect_AgeID
Employer
prospect_Em
AddressLine2
prospect_AddLi2
Age
prospect_Ag
Income
prospect_In
LastName
prospect_LaN
OwnOrRentFlag
prospect_OwOReFl
Phone
prospect_Ph
MiddleInitial
prospect_MidIn
MaritalStatus
prospect_MariSt
Country
prospect_Co
NumberCars
prospect_NuCa
AddressLine1
prospect_AdLi1
NumberChildren
prospect_NuCh
CreditRating
prospect_CreRat
output: {"column_mappings": [["AgencyID", "prospect_AgeID"], ["Employer", "prospect_Em"], ["AddressLine2", "prospect_AddLi2"], ["Age", "prospect_Ag"], ["Income", "prospect_In"], ["LastName", "prospect_LaN"], ["OwnOrRentFlag", "prospect_OwOReFl"], ["Phone", "prospect_Ph"], ["MiddleInitial", "prospect_MidIn"], ["MaritalStatus", "prospect_MariSt"], ["Country", "prospect_Co"], ["NumberCars", "prospect_NuCa"], ["AddressLine1", "prospect_AdLi1"], ["NumberChildren", "prospect_NuCh"], ["CreditRating", "prospect_CreRat"], ["FirstName", null], ["Gender", null], ["PostalCode", null]]}