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

TableB:
| prospect_AgID   | prospect_OwORFl   | prospect_Em                    | prospect_Co              | prospect_FiN                | prospect_AdLi1                                                              |   prospect_In |   prospect_NuCa | prospect_NuCh   | prospect_MarSt   |   prospect_A |   prospect_CrRat | prospect_NuCreCa   |   prospect_NeWor |
|:----------------|:------------------|:-------------------------------|:-------------------------|:----------------------------|:----------------------------------------------------------------------------|--------------:|----------------:|:----------------|:-----------------|-------------:|-----------------:|:-------------------|-----------------:|
| Iok7501         | U                 | FM Global                      | United States of America | wbwsqgtaa                   | jsurlejkapodmkaccruslfkcqmbcquahsyweopxdxknl                                |         94490 |               3 |                 | U                |            7 |              580 |                    | 321776           |
| tia7502         | R                 | MGIC Investment                | Canada                   | QGJWCPAPZMWHYHZTNOYSSOQBI   | Ggptcoorkpeeigqzevhwhjdxdfbrmidyxsugikhgmuvvpcptuphjlgmipvhrrsgepibdupa     |          7037 |               4 | 4.0             | S                |           48 |              683 | 2.0                |      2.29232e+06 |
| AOI7503         | O                 | Ross Stores                    |                          | BHGXDDPUMBESLQMNEPREPTZNNKM | Gpcvjzlwouagawronludakqiuhbrbpbkkltrnlkoezgwcawpayfsnejpkmisnryphbtztbfemoy |        419269 |               1 | 5.0             | M                |           14 |              411 | 2.0                | 969707           |
| PJQ7504         | U                 |                                | United States of America | Xgnvppcxgfnmawlupgfa        | Yxkhkvrobywpdczvwmjgxvnuduavcpyiuceglhaskahgyxqpqjbdroyojouqkzfwvfpsddisy   |         76681 |               4 | 5.0             | W                |           29 |              818 | 9.0                |      3.89946e+06 |
| SDV7505         | R                 | Alliance One International     | United States of America | Tfiozpstcftslqtwkgngiiwo    | Ddsarhvraiskwmrddncqwvzkmjmxtgnpbtgyop                                      |        209116 |               2 | 4.0             | U                |           69 |              370 | 7.0                |      3.74922e+06 |
| Hga7506         | O                 | Sally Beauty Holdings          |                          | fbcahlrhhjoslfzqvvwwvhk     | Ajpkrmtlcbdzr                                                               |        212203 |               0 | 0.0             | U                |           47 |              833 | 6.0                |      3.65853e+06 |
| Beo7507         | U                 | Wisconsin Energy               | Canada                   | Dcgkohfcwyoaxckalqnkrzwq    | PKSTPUXQIRGWSXSKWRAJTTNBAOLQKAAJFAPGWIHBWVCHOXLE                            |         42018 |               5 | 5.0             | M                |            0 |              536 | 2.0                |      1.73846e+06 |
| Qum7508         | R                 | Carpenter Technology           | United States of America | Vmnmcsinflxxmmifydckncc     | gyhrpdbplficrfirmtavitgpfmhnnhvsuoqwxrulxlqrdqkzshqovucentrxlakgkpwbrgtd    |         90446 |               0 | 0.0             | S                |           46 |              775 | 0.0                |      3.3073e+06  |
| Hud7509         | R                 | Liberty Mutual Insurance Group | United States of America | Vrkbkkxkddtximspigmlbwzt    | GJTWIDOQOAPDVVULJGOOJBWTTANDJXOCQHWWZAGLGMJQXJOMWFTFVGXIH                   |         16274 |               1 | 1.0             | M                |            6 |              765 | 3.0                |      1.81642e+06 |
| jba7510         | O                 | Black & Decker                 | Canada                   | RMWCTFTLSVTMCBI             | Ycltsquohmuugxihqyluhkoy                                                    |         22215 |               5 | 2.0             | M                |           22 |              555 | 6.0                |      2.59925e+06 |



source_headers: AgencyID
OwnOrRentFlag
Employer
Country
FirstName
AddressLine1
target_headers: prospect_AgID
prospect_OwORFl
prospect_Em
prospect_Co
prospect_FiN
prospect_AdLi1
column_mappings: AgencyID
prospect_AgID
OwnOrRentFlag
prospect_OwORFl
Employer
prospect_Em
Country
prospect_Co
FirstName
prospect_FiN
AddressLine1
prospect_AdLi1
output: {"column_mappings": [["AgencyID", "prospect_AgID"], ["OwnOrRentFlag", "prospect_OwORFl"], ["Employer", "prospect_Em"], ["Country", "prospect_Co"], ["FirstName", "prospect_FiN"], ["AddressLine1", "prospect_AdLi1"], ["LastName", null], ["MiddleInitial", null], ["Gender", null], ["AddressLine2", null], ["PostalCode", null], ["City", null], ["State", null], ["Phone", null]]}