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   | FirstName   | Country               | Employer             |   Income | Phone          | LastName   | PostalCode   | OwnOrRentFlag   | AddressLine2   | NumberChildren   | Gender   | NumberCreditCards   | State              | NumberCars   | MiddleInitial   | AddressLine1         | City           |
|:-----------|:------------|:----------------------|:---------------------|---------:|:---------------|:-----------|:-------------|:----------------|:---------------|:-----------------|:---------|:--------------------|:-------------------|:-------------|:----------------|:---------------------|:---------------|
| PEL0       | N4tti       | UnotedStafes9fAmrrica | Bginks               |   391643 | 1 712 522 6088 | PELkAND    | T6b2i1       | O               |                | 2.0              | f        |                     | MA                 |              |                 | 21847 olympia street | Fairbanks      |
| LED1       | T4UDY       | UmjterStatesofAme4ica |                      |   420637 | 1 626 426 4298 | oEDUC      | 77281        | U               | AlT624         | 3.0              | F        | 10.0                | PA                 | 7.0          |                 | 245 congress court   | Quebec         |
| lat2       | irsland     | UmitedStatesotAkericz |                      |    24260 | 1 524 787 8784 | katif      | 91355        | O               |                | 3.0              |          | 7.0                 | Albfrta            | 4.0          |                 | 6517 frailing west   | Henderson      |
| RUD3       | M8sti       | Canzda                | AkrProd6ctsCh3mocals |   166219 | 1 741 997 1688 | RUDeICK    | 36615        | O               |                | 2.0              |          | 5.0                 | AR                 | 3.0          |                 | 11449 blalock park   | Salem          |
| JAY4       | sadena      | Canadz                | Oshuosh              |    55781 | 1 002 194 1991 | JzYAMANNE  | t6awi3       | O               | Apt629         | 2.0              | f        | 11.0                | OR                 | 2.0          | M               | 18354 dodd court     | Toledo         |
| tod5       | Paulettw    | UbitrrStatesofAmsrica |                      |   443244 | 1 441 371 7651 | todo       | A2f1v3       | R               |                | 1.0              | M        | 7.0                 | VA                 | 6.0          | Z               | 14117 roxboro street | Corpus Christi |
| Kan6       | AMApITA     | Cahada                | VeraShgEnergy        |   311813 | 1 957 940 5980 | Kwnno      | 49513        | O               |                | 1.0              | m        | 2.0                 | OH                 | 5.0          | R               | 24697 FLORENCE WEST  | Salt Lake City |
| Din7       | Ernesti     | jmitedStatrsifAmerica | IDT                  |   173668 | 1 768 633 4096 | Dinkrl     | M5x1v6       | U               |                | 3.0              |          | 5.0                 | lrinceEdward9slane | 4.0          | Z               | 6488 applewood drive | Brownsville    |
| Thi8       | Toby        | UmitedqtateaofAmericq | Afams3esourvesEne5gy |   225102 | 1 107 689 2155 | yhibodeauz | d6c1q1       | O               |                |                  |          | 11.0                | NV                 | 2.0          |                 | 17404 gale court     | Escondido      |
| May9       | evangepia   | Un8terStatesorAmericx | MyICInvesgment       |   292735 | 1 173 594 6096 | Mayo       | 99716        | O               |                | 1.0              |          |                     | Ontarii            | 5.0          |                 | 15913 alexis street  | Los Angeles    |

TableB:
| prospect_AgID   | prospect_FirNa   | prospect_Cou             | prospect_Emp             |   prospect_Inc | prospect_Ph    | prospect_LaNa   | prospect_PosC   | prospect_OOReF   | prospect_AddL2   | prospect_NumChil   | prospect_Ge   | prospect_NumCrCa   | prospect_Sta         | prospect_NumC   | prospect_MaSta   | prospect_Ag   | prospect_CreRa   |     prospect_NWo |
|:----------------|:-----------------|:-------------------------|:-------------------------|---------------:|:---------------|:----------------|:----------------|:-----------------|:-----------------|:-------------------|:--------------|:-------------------|:---------------------|:----------------|:-----------------|:--------------|:-----------------|-----------------:|
| PEL0            | Netti            | United States of America | Brink's                  |         368776 | 1-712-522-6088 | PELLAND         | T6b 1i1         | O                |                  | 3.0                | f             |                    | MA                   |                 | W                | 20.0          | 760.0            |      1.05887e+06 |
| LED1            | TRUDY            | United States of America |                          |         177967 | 1-626-426-4298 | LEDUC           | 77281           | U                | APT. 624         | 1.0                | F             | 6.0                | PA                   | 5.0             | U                | 3.0           | 555.0            |      1.98818e+06 |
| lat2            | ireland          | United States of America |                          |         321772 | 1-524-787-8784 | latif           | 91355           | O                |                  | 1.0                |               | 6.0                | Alberta              | 2.0             | S                |               | 566.0            |      3.67313e+06 |
| RUD3            | Misti            | Canada                   | Air Products & Chemicals |          25449 | 1-741-997-1688 | RUDDICK         | 36615           | O                |                  | 1.0                |               | 3.0                | AR                   | 2.0             | W                | 77.0          |                  |      2.0059e+06  |
| JAY4            | sarena           | Canada                   | Oshkosh                  |         166567 | 1-002-194-1991 | JAYAMANNE       | t6a 1i3         | O                | Apt. 619         | 3.0                | f             | 4.0                | OR                   | 0.0             | M                | 21.0          | 815.0            | 624736           |
| tod5            | Paulette         | United States of America |                          |          43631 | 1-441-371-7651 | todo            | A2b 1v3         | R                |                  | 4.0                | M             | 10.0               | VA                   | 1.0             | M                | 77.0          | 333.0            |      3.06462e+06 |
| Kan6            | AMALITA          | Canada                   | VeraSun Energy           |         466230 | 1-957-940-5980 | Kanno           | 49513           | O                |                  | 0.0                | m             | 1.0                | OH                   | 4.0             |                  | 23.0          | 528.0            |      3.48913e+06 |
| Din7            | Ernesto          | United States of America | IDT                      |         420243 | 1-768-633-4096 | Dinkel          | M5d 1v6         | U                |                  | 2.0                |               | 7.0                | Prince Edward Island | 2.0             | M                | 9.0           | 680.0            |      3.43074e+06 |
| Thi8            | Toby             | United States of America | Adams Resources & Energy |         141862 | 1-107-689-2155 | Thibodeaux      | V6c 1q1         | O                |                  |                    |               | 10.0               | NV                   | 3.0             | U                | 63.0          | 761.0            |      1.74361e+06 |
| May9            | evangelia        | United States of America | MGIC Investment          |         402011 | 1-173-594-6096 | Mayo            | 99716           | O                |                  | 2.0                |               |                    | Ontario              | 0.0             | M                | 32.0          | 416.0            | 216299           |



source_headers: AgencyID
FirstName
Country
Employer
Income
Phone
LastName
PostalCode
OwnOrRentFlag
AddressLine2
NumberChildren
Gender
NumberCreditCards
State
NumberCars
target_headers: prospect_AgID
prospect_FirNa
prospect_Cou
prospect_Emp
prospect_Inc
prospect_Ph
prospect_LaNa
prospect_PosC
prospect_OOReF
prospect_AddL2
prospect_NumChil
prospect_Ge
prospect_NumCrCa
prospect_Sta
prospect_NumC
column_mappings: AgencyID
prospect_AgID
FirstName
prospect_FirNa
Country
prospect_Cou
Employer
prospect_Emp
Income
prospect_Inc
Phone
prospect_Ph
LastName
prospect_LaNa
PostalCode
prospect_PosC
OwnOrRentFlag
prospect_OOReF
AddressLine2
prospect_AddL2
NumberChildren
prospect_NumChil
Gender
prospect_Ge
NumberCreditCards
prospect_NumCrCa
State
prospect_Sta
NumberCars
prospect_NumC
output: {"column_mappings": [["AgencyID", "prospect_AgID"], ["FirstName", "prospect_FirNa"], ["Country", "prospect_Cou"], ["Employer", "prospect_Emp"], ["Income", "prospect_Inc"], ["Phone", "prospect_Ph"], ["LastName", "prospect_LaNa"], ["PostalCode", "prospect_PosC"], ["OwnOrRentFlag", "prospect_OOReF"], ["AddressLine2", "prospect_AddL2"], ["NumberChildren", "prospect_NumChil"], ["Gender", "prospect_Ge"], ["NumberCreditCards", "prospect_NumCrCa"], ["State", "prospect_Sta"], ["NumberCars", "prospect_NumC"], ["MiddleInitial", null], ["AddressLine1", null], ["City", null]]}