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   | CreditRating   | AddressLine2   | Employer                 | FirstName   | MiddleInitial   | LastName   | Gender   | AddressLine1         | PostalCode   | City           | State                | Country                  | Phone          |
|:-----------|:---------------|:---------------|:-------------------------|:------------|:----------------|:-----------|:---------|:---------------------|:-------------|:---------------|:---------------------|:-------------------------|:---------------|
| PEL0       | 760.0          |                | Brink's                  | Netti       |                 | PELLAND    | f        | 21847 olympia street | T6b 1i1      | Fairbanks      | MA                   | United States of America | 1-712-522-6088 |
| LED1       | 555.0          | APT. 624       |                          | TRUDY       |                 | LEDUC      | F        | 245 congress court   | 77281        | Quebec         | PA                   | United States of America | 1-626-426-4298 |
| lat2       | 566.0          |                |                          | ireland     |                 | latif      |          | 6517 frailing west   | 91355        | Henderson      | Alberta              | United States of America | 1-524-787-8784 |
| RUD3       |                |                | Air Products & Chemicals | Misti       |                 | RUDDICK    |          | 11449 blalock park   | 36615        | Salem          | AR                   | Canada                   | 1-741-997-1688 |
| JAY4       | 815.0          | Apt. 619       | Oshkosh                  | sarena      | M               | JAYAMANNE  | f        | 18354 dodd court     | t6a 1i3      | Toledo         | OR                   | Canada                   | 1-002-194-1991 |
| tod5       | 333.0          |                |                          | Paulette    | Z               | todo       | M        | 14117 roxboro street | A2b 1v3      | Corpus Christi | VA                   | United States of America | 1-441-371-7651 |
| Kan6       | 528.0          |                | VeraSun Energy           | AMALITA     | R               | Kanno      | m        | 24697 FLORENCE WEST  | 49513        | Salt Lake City | OH                   | Canada                   | 1-957-940-5980 |
| Din7       | 680.0          |                | IDT                      | Ernesto     | Z               | Dinkel     |          | 6488 applewood drive | M5d 1v6      | Brownsville    | Prince Edward Island | United States of America | 1-768-633-4096 |
| Thi8       | 761.0          |                | Adams Resources & Energy | Toby        |                 | Thibodeaux |          | 17404 gale court     | V6c 1q1      | Escondido      | NV                   | United States of America | 1-107-689-2155 |
| May9       | 416.0          |                | MGIC Investment          | evangelia   |                 | Mayo       |          | 15913 alexis street  | 99716        | Los Angeles    | Ontario              | United States of America | 1-173-594-6096 |

TableB:
| AgeID   |   CreRa | AddL2                                                             | Empl                           | FiNa                        | MiIn   |    Inc |   NumCa | NuChil   | MaSta   |   A | OOReFl   | NumCreCar   |              NWo |
|:--------|--------:|:------------------------------------------------------------------|:-------------------------------|:----------------------------|:-------|-------:|--------:|:---------|:--------|----:|:---------|:------------|-----------------:|
| Iok7501 |     580 | GKOIKEZZMQTPQUQZLSAUUMVBDPAXTWNWSXTYJYQ                           | FM Global                      | wbwsqgtaa                   | n      |  94490 |       3 |          | U       |   7 | U        |             | 321776           |
| tia7502 |     683 | ocmgcvnexhqhgoyrwpkgaopthdvandlzaaleqccjpjkbirtcqvorobgskhtlgndvn | MGIC Investment                | QGJWCPAPZMWHYHZTNOYSSOQBI   |        |   7037 |       4 | 4.0      | S       |  48 | R        | 2.0         |      2.29232e+06 |
| AOI7503 |     411 | Cdrxeolwrrxmwmhgexvcstvzz                                         | Ross Stores                    | BHGXDDPUMBESLQMNEPREPTZNNKM | u      | 419269 |       1 | 5.0      | M       |  14 | O        | 2.0         | 969707           |
| PJQ7504 |     818 | WKSBVOFGJHQGAEKUYRZHHPH                                           |                                | Xgnvppcxgfnmawlupgfa        |        |  76681 |       4 | 5.0      | W       |  29 | U        | 9.0         |      3.89946e+06 |
| SDV7505 |     370 | skxijfqpzshmts                                                    | Alliance One International     | Tfiozpstcftslqtwkgngiiwo    |        | 209116 |       2 | 4.0      | U       |  69 | R        | 7.0         |      3.74922e+06 |
| Hga7506 |     833 | ZETOHHRKIBHCQCKZODIXJJSXCFY                                       | Sally Beauty Holdings          | fbcahlrhhjoslfzqvvwwvhk     | F      | 212203 |       0 | 0.0      | U       |  47 | O        | 6.0         |      3.65853e+06 |
| Beo7507 |     536 | LJXAXKUJXQBGWBHJJAAM                                              | Wisconsin Energy               | Dcgkohfcwyoaxckalqnkrzwq    | D      |  42018 |       5 | 5.0      | M       |   0 | U        | 2.0         |      1.73846e+06 |
| Qum7508 |     775 | Jmlgjkjbqhrudrkqrm                                                | Carpenter Technology           | Vmnmcsinflxxmmifydckncc     |        |  90446 |       0 | 0.0      | S       |  46 | R        | 0.0         |      3.3073e+06  |
| Hud7509 |     765 | Qqcilgblxyikgr                                                    | Liberty Mutual Insurance Group | Vrkbkkxkddtximspigmlbwzt    | v      |  16274 |       1 | 1.0      | M       |   6 | R        | 3.0         |      1.81642e+06 |
| jba7510 |     555 | Ahtohqjfzfarn                                                     | Black & Decker                 | RMWCTFTLSVTMCBI             |        |  22215 |       5 | 2.0      | M       |  22 | O        | 6.0         |      2.59925e+06 |



source_headers: AgencyID
CreditRating
AddressLine2
Employer
FirstName
MiddleInitial
target_headers: AgeID
CreRa
AddL2
Empl
FiNa
MiIn
column_mappings: AgencyID
AgeID
CreditRating
CreRa
AddressLine2
AddL2
Employer
Empl
FirstName
FiNa
MiddleInitial
MiIn
output: {"column_mappings": [["AgencyID", "AgeID"], ["CreditRating", "CreRa"], ["AddressLine2", "AddL2"], ["Employer", "Empl"], ["FirstName", "FiNa"], ["MiddleInitial", "MiIn"], ["LastName", null], ["Gender", null], ["AddressLine1", null], ["PostalCode", null], ["City", null], ["State", null], ["Country", null], ["Phone", null]]}