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   | Phone          | NumberCars   | State                | City           | LastName   | MiddleInitial   | Gender   | AddressLine1         | AddressLine2   | PostalCode   | Country                  |   Income |
|:-----------|:------------|:---------------|:-------------|:---------------------|:---------------|:-----------|:----------------|:---------|:---------------------|:---------------|:-------------|:-------------------------|---------:|
| PEL0       | Netti       | 1-712-522-6088 |              | MA                   | Fairbanks      | PELLAND    |                 | f        | 21847 olympia street |                | T6b 1i1      | United States of America |   368776 |
| LED1       | TRUDY       | 1-626-426-4298 | 5.0          | PA                   | Quebec         | LEDUC      |                 | F        | 245 congress court   | APT. 624       | 77281        | United States of America |   177967 |
| lat2       | ireland     | 1-524-787-8784 | 2.0          | Alberta              | Henderson      | latif      |                 |          | 6517 frailing west   |                | 91355        | United States of America |   321772 |
| RUD3       | Misti       | 1-741-997-1688 | 2.0          | AR                   | Salem          | RUDDICK    |                 |          | 11449 blalock park   |                | 36615        | Canada                   |    25449 |
| JAY4       | sarena      | 1-002-194-1991 | 0.0          | OR                   | Toledo         | JAYAMANNE  | M               | f        | 18354 dodd court     | Apt. 619       | t6a 1i3      | Canada                   |   166567 |
| tod5       | Paulette    | 1-441-371-7651 | 1.0          | VA                   | Corpus Christi | todo       | Z               | M        | 14117 roxboro street |                | A2b 1v3      | United States of America |    43631 |
| Kan6       | AMALITA     | 1-957-940-5980 | 4.0          | OH                   | Salt Lake City | Kanno      | R               | m        | 24697 FLORENCE WEST  |                | 49513        | Canada                   |   466230 |
| Din7       | Ernesto     | 1-768-633-4096 | 2.0          | Prince Edward Island | Brownsville    | Dinkel     | Z               |          | 6488 applewood drive |                | M5d 1v6      | United States of America |   420243 |
| Thi8       | Toby        | 1-107-689-2155 | 3.0          | NV                   | Escondido      | Thibodeaux |                 |          | 17404 gale court     |                | V6c 1q1      | United States of America |   141862 |
| May9       | evangelia   | 1-173-594-6096 | 0.0          | Ontario              | Los Angeles    | Mayo       |                 |          | 15913 alexis street  |                | 99716        | United States of America |   402011 |

TableB:
| prospect_gncd   | prospect_frstnm             | prospect_phn   |   prospect_nmbrcrs | prospect_stt   | prospect_ct   | prospect_nmbrchldrn   | prospect_mrtlstts   |   prospect_g |   prospect_crdtrtng | prospect_wnrrntflg   | prospect_mplr                  | prospect_nmbrcrdtcrds   |   prospect_ntwrth |
|:----------------|:----------------------------|:---------------|-------------------:|:---------------|:--------------|:----------------------|:--------------------|-------------:|--------------------:|:---------------------|:-------------------------------|:------------------------|------------------:|
| Iok7501         | wbwsqgtaa                   | 1-637-119-9996 |                  3 | MO             | Baltimore     |                       | U                   |            7 |                 580 | U                    | FM Global                      |                         |  321776           |
| tia7502         | QGJWCPAPZMWHYHZTNOYSSOQBI   | 1-560-405-0048 |                  4 | TX             | Kitchener     | 4.0                   | S                   |           48 |                 683 | R                    | MGIC Investment                | 2.0                     |       2.29232e+06 |
| AOI7503         | BHGXDDPUMBESLQMNEPREPTZNNKM | 1-261-306-5079 |                  1 | CT             | Saint John    | 5.0                   | M                   |           14 |                 411 | O                    | Ross Stores                    | 2.0                     |  969707           |
| PJQ7504         | Xgnvppcxgfnmawlupgfa        | 1-642-299-6655 |                  4 | UT             | Berkeley      | 5.0                   | W                   |           29 |                 818 | U                    |                                | 9.0                     |       3.89946e+06 |
| SDV7505         | Tfiozpstcftslqtwkgngiiwo    |                |                  2 | RI             | Missoula      | 4.0                   | U                   |           69 |                 370 | R                    | Alliance One International     | 7.0                     |       3.74922e+06 |
| Hga7506         | fbcahlrhhjoslfzqvvwwvhk     | 1-388-257-4273 |                  0 | DE             | Salinas       | 0.0                   | U                   |           47 |                 833 | O                    | Sally Beauty Holdings          | 6.0                     |       3.65853e+06 |
| Beo7507         | Dcgkohfcwyoaxckalqnkrzwq    |                |                  5 | NM             | San Jose      | 5.0                   | M                   |            0 |                 536 | U                    | Wisconsin Energy               | 2.0                     |       1.73846e+06 |
| Qum7508         | Vmnmcsinflxxmmifydckncc     | 1-632-118-1891 |                  0 | WV             | Cleveland     | 0.0                   | S                   |           46 |                 775 | R                    | Carpenter Technology           | 0.0                     |       3.3073e+06  |
| Hud7509         | Vrkbkkxkddtximspigmlbwzt    | 1-853-806-4986 |                  1 | NH             | Huntington    | 1.0                   | M                   |            6 |                 765 | R                    | Liberty Mutual Insurance Group | 3.0                     |       1.81642e+06 |
| jba7510         | RMWCTFTLSVTMCBI             | 1-220-687-2027 |                  5 | WY             | Paterson      | 2.0                   | M                   |           22 |                 555 | O                    | Black & Decker                 | 6.0                     |       2.59925e+06 |



source_headers: AgencyID
FirstName
Phone
NumberCars
State
City
target_headers: prospect_gncd
prospect_frstnm
prospect_phn
prospect_nmbrcrs
prospect_stt
prospect_ct
column_mappings: AgencyID
prospect_gncd
FirstName
prospect_frstnm
Phone
prospect_phn
NumberCars
prospect_nmbrcrs
State
prospect_stt
City
prospect_ct
output: {"column_mappings": [["AgencyID", "prospect_gncd"], ["FirstName", "prospect_frstnm"], ["Phone", "prospect_phn"], ["NumberCars", "prospect_nmbrcrs"], ["State", "prospect_stt"], ["City", "prospect_ct"], ["LastName", null], ["MiddleInitial", null], ["Gender", null], ["AddressLine1", null], ["AddressLine2", null], ["PostalCode", null], ["Country", null], ["Income", null]]}