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   | PostalCode   | NumberChildren   | AddressLine2   | AddressLine1         | Gender   | NumberCreditCards   | City           |         NetWorth | MiddleInitial   | Employer                 | CreditRating   | Phone          | LastName   | NumberCars   | FirstName   | State                | Country                  |
|:-----------|:-------------|:-----------------|:---------------|:---------------------|:---------|:--------------------|:---------------|-----------------:|:----------------|:-------------------------|:---------------|:---------------|:-----------|:-------------|:------------|:---------------------|:-------------------------|
| PEL0       | T6b 1i1      | 3.0              |                | 21847 olympia street | f        |                     | Fairbanks      |      1.05887e+06 |                 | Brink's                  | 760.0          | 1-712-522-6088 | PELLAND    |              | Netti       | MA                   | United States of America |
| LED1       | 77281        | 1.0              | APT. 624       | 245 congress court   | F        | 6.0                 | Quebec         |      1.98818e+06 |                 |                          | 555.0          | 1-626-426-4298 | LEDUC      | 5.0          | TRUDY       | PA                   | United States of America |
| lat2       | 91355        | 1.0              |                | 6517 frailing west   |          | 6.0                 | Henderson      |      3.67313e+06 |                 |                          | 566.0          | 1-524-787-8784 | latif      | 2.0          | ireland     | Alberta              | United States of America |
| RUD3       | 36615        | 1.0              |                | 11449 blalock park   |          | 3.0                 | Salem          |      2.0059e+06  |                 | Air Products & Chemicals |                | 1-741-997-1688 | RUDDICK    | 2.0          | Misti       | AR                   | Canada                   |
| JAY4       | t6a 1i3      | 3.0              | Apt. 619       | 18354 dodd court     | f        | 4.0                 | Toledo         | 624736           | M               | Oshkosh                  | 815.0          | 1-002-194-1991 | JAYAMANNE  | 0.0          | sarena      | OR                   | Canada                   |
| tod5       | A2b 1v3      | 4.0              |                | 14117 roxboro street | M        | 10.0                | Corpus Christi |      3.06462e+06 | Z               |                          | 333.0          | 1-441-371-7651 | todo       | 1.0          | Paulette    | VA                   | United States of America |
| Kan6       | 49513        | 0.0              |                | 24697 FLORENCE WEST  | m        | 1.0                 | Salt Lake City |      3.48913e+06 | R               | VeraSun Energy           | 528.0          | 1-957-940-5980 | Kanno      | 4.0          | AMALITA     | OH                   | Canada                   |
| Din7       | M5d 1v6      | 2.0              |                | 6488 applewood drive |          | 7.0                 | Brownsville    |      3.43074e+06 | Z               | IDT                      | 680.0          | 1-768-633-4096 | Dinkel     | 2.0          | Ernesto     | Prince Edward Island | United States of America |
| Thi8       | V6c 1q1      |                  |                | 17404 gale court     |          | 10.0                | Escondido      |      1.74361e+06 |                 | Adams Resources & Energy | 761.0          | 1-107-689-2155 | Thibodeaux | 3.0          | Toby        | NV                   | United States of America |
| May9       | 99716        | 2.0              |                | 15913 alexis street  |          |                     | Los Angeles    | 216299           |                 | MGIC Investment          | 416.0          | 1-173-594-6096 | Mayo       | 0.0          | evangelia   | Ontario              | United States of America |

TableB:
| prospect_gncd   | prospect_pstlcd   | prospect_nmbrchldrn   | prospect_ddrssln2                                                 | prospect_ddrssln1                                                           | prospect_gndr   | prospect_nmbrcrdtcrds   | prospect_ct   |   prospect_ntwrth | prospect_mddlntl   | prospect_mplr                  |   prospect_crdtrtng | prospect_phn   | prospect_lstnm                |   prospect_nmbrcrs |   prospect_ncm | prospect_mrtlstts   |   prospect_g | prospect_wnrrntflg   |
|:----------------|:------------------|:----------------------|:------------------------------------------------------------------|:----------------------------------------------------------------------------|:----------------|:------------------------|:--------------|------------------:|:-------------------|:-------------------------------|--------------------:|:---------------|:------------------------------|-------------------:|---------------:|:--------------------|-------------:|:---------------------|
| Iok7501         | Guudshirvcu       |                       | GKOIKEZZMQTPQUQZLSAUUMVBDPAXTWNWSXTYJYQ                           | jsurlejkapodmkaccruslfkcqmbcquahsyweopxdxknl                                |                 |                         | Baltimore     |  321776           | n                  | FM Global                      |                 580 | 1-637-119-9996 | Iokwiqojocjanndatkdzgymym     |                  3 |          94490 | U                   |            7 | U                    |
| tia7502         | wyggjewbe         | 4.0                   | ocmgcvnexhqhgoyrwpkgaopthdvandlzaaleqccjpjkbirtcqvorobgskhtlgndvn | Ggptcoorkpeeigqzevhwhjdxdfbrmidyxsugikhgmuvvpcptuphjlgmipvhrrsgepibdupa     | M               | 2.0                     | Kitchener     |       2.29232e+06 |                    | MGIC Investment                |                 683 | 1-560-405-0048 | tiabxgseasiibxakctfzhfwotp    |                  4 |           7037 | S                   |           48 | R                    |
| AOI7503         | YMZRQICUTHT       | 5.0                   | Cdrxeolwrrxmwmhgexvcstvzz                                         | Gpcvjzlwouagawronludakqiuhbrbpbkkltrnlkoezgwcawpayfsnejpkmisnryphbtztbfemoy |                 | 2.0                     | Saint John    |  969707           | u                  | Ross Stores                    |                 411 | 1-261-306-5079 | AOIWIWTIHIXOJ                 |                  1 |         419269 | M                   |           14 | O                    |
| PJQ7504         | Bcjuycmcen        | 5.0                   | WKSBVOFGJHQGAEKUYRZHHPH                                           | Yxkhkvrobywpdczvwmjgxvnuduavcpyiuceglhaskahgyxqpqjbdroyojouqkzfwvfpsddisy   | m               | 9.0                     | Berkeley      |       3.89946e+06 |                    |                                |                 818 | 1-642-299-6655 | PJQSPMBUHYQKBOZ               |                  4 |          76681 | W                   |           29 | U                    |
| SDV7505         | Nujxguyehf        | 4.0                   | skxijfqpzshmts                                                    | Ddsarhvraiskwmrddncqwvzkmjmxtgnpbtgyop                                      |                 | 7.0                     | Missoula      |       3.74922e+06 |                    | Alliance One International     |                 370 |                | SDVLJWXENNGWCQMIW             |                  2 |         209116 | U                   |           69 | R                    |
| Hga7506         | Neigswk           | 0.0                   | ZETOHHRKIBHCQCKZODIXJJSXCFY                                       | Ajpkrmtlcbdzr                                                               | F               | 6.0                     | Salinas       |       3.65853e+06 | F                  | Sally Beauty Holdings          |                 833 | 1-388-257-4273 | Hgakmykzeunwkiaxayulpwyxrcuev |                  0 |         212203 | U                   |           47 | O                    |
| Beo7507         | WNCEOQPLW         | 5.0                   | LJXAXKUJXQBGWBHJJAAM                                              | PKSTPUXQIRGWSXSKWRAJTTNBAOLQKAAJFAPGWIHBWVCHOXLE                            | M               | 2.0                     | San Jose      |       1.73846e+06 | D                  | Wisconsin Energy               |                 536 |                | Beotomyndkiqryllkvpavllytov   |                  5 |          42018 | M                   |            0 | U                    |
| Qum7508         | Cskdwtkf          | 0.0                   | Jmlgjkjbqhrudrkqrm                                                | gyhrpdbplficrfirmtavitgpfmhnnhvsuoqwxrulxlqrdqkzshqovucentrxlakgkpwbrgtd    |                 | 0.0                     | Cleveland     |       3.3073e+06  |                    | Carpenter Technology           |                 775 | 1-632-118-1891 | Qumxrssnd                     |                  0 |          90446 | S                   |           46 | R                    |
| Hud7509         | tcxswloetdt       | 1.0                   | Qqcilgblxyikgr                                                    | GJTWIDOQOAPDVVULJGOOJBWTTANDJXOCQHWWZAGLGMJQXJOMWFTFVGXIH                   |                 | 3.0                     | Huntington    |       1.81642e+06 | v                  | Liberty Mutual Insurance Group |                 765 | 1-853-806-4986 | Hudlpfwjagzbnznyhamjkhbf      |                  1 |          16274 | M                   |            6 | R                    |
| jba7510         | Fkpemasoukih      | 2.0                   | Ahtohqjfzfarn                                                     | Ycltsquohmuugxihqyluhkoy                                                    | m               | 6.0                     | Paterson      |       2.59925e+06 |                    | Black & Decker                 |                 555 | 1-220-687-2027 | jbabemsfwdyeihxq              |                  5 |          22215 | M                   |           22 | O                    |



source_headers: AgencyID
PostalCode
NumberChildren
AddressLine2
AddressLine1
Gender
NumberCreditCards
City
NetWorth
MiddleInitial
Employer
CreditRating
Phone
LastName
NumberCars
target_headers: prospect_gncd
prospect_pstlcd
prospect_nmbrchldrn
prospect_ddrssln2
prospect_ddrssln1
prospect_gndr
prospect_nmbrcrdtcrds
prospect_ct
prospect_ntwrth
prospect_mddlntl
prospect_mplr
prospect_crdtrtng
prospect_phn
prospect_lstnm
prospect_nmbrcrs
column_mappings: AgencyID
prospect_gncd
PostalCode
prospect_pstlcd
NumberChildren
prospect_nmbrchldrn
AddressLine2
prospect_ddrssln2
AddressLine1
prospect_ddrssln1
Gender
prospect_gndr
NumberCreditCards
prospect_nmbrcrdtcrds
City
prospect_ct
NetWorth
prospect_ntwrth
MiddleInitial
prospect_mddlntl
Employer
prospect_mplr
CreditRating
prospect_crdtrtng
Phone
prospect_phn
LastName
prospect_lstnm
NumberCars
prospect_nmbrcrs
output: {"column_mappings": [["AgencyID", "prospect_gncd"], ["PostalCode", "prospect_pstlcd"], ["NumberChildren", "prospect_nmbrchldrn"], ["AddressLine2", "prospect_ddrssln2"], ["AddressLine1", "prospect_ddrssln1"], ["Gender", "prospect_gndr"], ["NumberCreditCards", "prospect_nmbrcrdtcrds"], ["City", "prospect_ct"], ["NetWorth", "prospect_ntwrth"], ["MiddleInitial", "prospect_mddlntl"], ["Employer", "prospect_mplr"], ["CreditRating", "prospect_crdtrtng"], ["Phone", "prospect_phn"], ["LastName", "prospect_lstnm"], ["NumberCars", "prospect_nmbrcrs"], ["FirstName", null], ["State", null], ["Country", null]]}