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   | AddressLine1       | MiddleInitial   | NumberCreditCards   | LastName   | Phone          | FirstName   | Gender   | AddressLine2   | PostalCode   | City           | State                | Country                  |   Income |
|:-----------|:-------------------|:----------------|:--------------------|:-----------|:---------------|:------------|:---------|:---------------|:-------------|:---------------|:---------------------|:-------------------------|---------:|
| PEL0       | 21u47olympoastr2et |                 |                     | PsLLAND    | 1 712 522 6088 | Netti       | f        |                | T6b 1i1      | Fairbanks      | MA                   | United States of America |   368776 |
| LED1       | q45dongresscoutt   |                 | 8.0                 | L2DUC      | 1 626 426 4298 | TRUDY       | F        | APT. 624       | 77281        | Quebec         | PA                   | United States of America |   177967 |
| lat2       | 6t17fra8l8ngwest   |                 | 8.0                 | iatif      | 1 524 787 8784 | ireland     |          |                | 91355        | Henderson      | Alberta              | United States of America |   321772 |
| RUD3       | 1q449bkakockpark   |                 | 6.0                 | RyDDICK    | 1 741 997 1688 | Misti       |          |                | 36615        | Salem          | AR                   | Canada                   |    25449 |
| JAY4       | q8354doddciurt     | M               | 10.0                | JAuAMANNE  | 1 002 194 1991 | sarena      | f        | Apt. 619       | t6a 1i3      | Toledo         | OR                   | Canada                   |   166567 |
| tod5       | 14117roxboeistr2et | Z               | 7.0                 | todo       | 1 441 371 7651 | Paulette    | M        |                | A2b 1v3      | Corpus Christi | VA                   | United States of America |    43631 |
| Kan6       | 24697FLORENCwdEeT  | R               | 6.0                 | oanno      | 1 957 940 5980 | AMALITA     | m        |                | 49513        | Salt Lake City | OH                   | Canada                   |   466230 |
| Din7       | 6588applewokddrivs | Z               | 8.0                 | D7nkel     | 1 768 633 4096 | Ernesto     |          |                | M5d 1v6      | Brownsville    | Prince Edward Island | United States of America |   420243 |
| Thi8       | 17504galecoury     |                 | 12.0                | hhibodsaux | 1 107 689 2155 | Toby        |          |                | V6c 1q1      | Escondido      | NV                   | United States of America |   141862 |
| May9       | 15913aoexisst3ee6  |                 |                     | Mayo       | 1 173 594 6096 | evangelia   |          |                | 99716        | Los Angeles    | Ontario              | United States of America |   402011 |

TableB:
| prospect_AgeID   | prospect_AddrL1      | prospect_MiIni   | prospect_NumCreCa   | prospect_LN   | prospect_Ph    | prospect_NumC   | prospect_NuCh   | prospect_MaSta   | prospect_Ag   | prospect_CrRa   | prospect_OORF   | prospect_Em              |     prospect_NWo |
|:-----------------|:---------------------|:-----------------|:--------------------|:--------------|:---------------|:----------------|:----------------|:-----------------|:--------------|:----------------|:----------------|:-------------------------|-----------------:|
| PEL0             | 21847 olympia street |                  |                     | PELLAND       | 1-712-522-6088 |                 | 3.0             | W                | 20.0          | 760.0           | O               | Brink's                  |      1.05887e+06 |
| LED1             | 245 congress court   |                  | 6.0                 | LEDUC         | 1-626-426-4298 | 5.0             | 1.0             | U                | 3.0           | 555.0           | U               |                          |      1.98818e+06 |
| lat2             | 6517 frailing west   |                  | 6.0                 | latif         | 1-524-787-8784 | 2.0             | 1.0             | S                |               | 566.0           | O               |                          |      3.67313e+06 |
| RUD3             | 11449 blalock park   |                  | 3.0                 | RUDDICK       | 1-741-997-1688 | 2.0             | 1.0             | W                | 77.0          |                 | O               | Air Products & Chemicals |      2.0059e+06  |
| JAY4             | 18354 dodd court     | M                | 4.0                 | JAYAMANNE     | 1-002-194-1991 | 0.0             | 3.0             | M                | 21.0          | 815.0           | O               | Oshkosh                  | 624736           |
| tod5             | 14117 roxboro street | Z                | 10.0                | todo          | 1-441-371-7651 | 1.0             | 4.0             | M                | 77.0          | 333.0           | R               |                          |      3.06462e+06 |
| Kan6             | 24697 FLORENCE WEST  | R                | 1.0                 | Kanno         | 1-957-940-5980 | 4.0             | 0.0             |                  | 23.0          | 528.0           | O               | VeraSun Energy           |      3.48913e+06 |
| Din7             | 6488 applewood drive | Z                | 7.0                 | Dinkel        | 1-768-633-4096 | 2.0             | 2.0             | M                | 9.0           | 680.0           | U               | IDT                      |      3.43074e+06 |
| Thi8             | 17404 gale court     |                  | 10.0                | Thibodeaux    | 1-107-689-2155 | 3.0             |                 | U                | 63.0          | 761.0           | O               | Adams Resources & Energy |      1.74361e+06 |
| May9             | 15913 alexis street  |                  |                     | Mayo          | 1-173-594-6096 | 0.0             | 2.0             | M                | 32.0          | 416.0           | O               | MGIC Investment          | 216299           |



source_headers: AgencyID
AddressLine1
MiddleInitial
NumberCreditCards
LastName
Phone
target_headers: prospect_AgeID
prospect_AddrL1
prospect_MiIni
prospect_NumCreCa
prospect_LN
prospect_Ph
column_mappings: AgencyID
prospect_AgeID
AddressLine1
prospect_AddrL1
MiddleInitial
prospect_MiIni
NumberCreditCards
prospect_NumCreCa
LastName
prospect_LN
Phone
prospect_Ph
output: {"column_mappings": [["AgencyID", "prospect_AgeID"], ["AddressLine1", "prospect_AddrL1"], ["MiddleInitial", "prospect_MiIni"], ["NumberCreditCards", "prospect_NumCreCa"], ["LastName", "prospect_LN"], ["Phone", "prospect_Ph"], ["FirstName", null], ["Gender", null], ["AddressLine2", null], ["PostalCode", null], ["City", null], ["State", null], ["Country", null], ["Income", null]]}