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   | NumberCreditCards   | AddressLine2   | CreditRating   | Phone          | Age   | MiddleInitial   | AddressLine1         | State                | NumberChildren   | PostalCode   | LastName   | FirstName   | Gender   | City           | Country                  |
|:-----------|:--------------------|:---------------|:---------------|:---------------|:------|:----------------|:---------------------|:---------------------|:-----------------|:-------------|:-----------|:------------|:---------|:---------------|:-------------------------|
| PEL0       |                     |                | 760.0          | 1-712-522-6088 | 20.0  |                 | 21847 olympia street | MA                   | 3.0              | T6b 1i1      | PELLAND    | Netti       | f        | Fairbanks      | United States of America |
| LED1       | 6.0                 | APT. 624       | 555.0          | 1-626-426-4298 | 3.0   |                 | 245 congress court   | PA                   | 1.0              | 77281        | LEDUC      | TRUDY       | F        | Quebec         | United States of America |
| lat2       | 6.0                 |                | 566.0          | 1-524-787-8784 |       |                 | 6517 frailing west   | Alberta              | 1.0              | 91355        | latif      | ireland     |          | Henderson      | United States of America |
| RUD3       | 3.0                 |                |                | 1-741-997-1688 | 77.0  |                 | 11449 blalock park   | AR                   | 1.0              | 36615        | RUDDICK    | Misti       |          | Salem          | Canada                   |
| JAY4       | 4.0                 | Apt. 619       | 815.0          | 1-002-194-1991 | 21.0  | M               | 18354 dodd court     | OR                   | 3.0              | t6a 1i3      | JAYAMANNE  | sarena      | f        | Toledo         | Canada                   |
| tod5       | 10.0                |                | 333.0          | 1-441-371-7651 | 77.0  | Z               | 14117 roxboro street | VA                   | 4.0              | A2b 1v3      | todo       | Paulette    | M        | Corpus Christi | United States of America |
| Kan6       | 1.0                 |                | 528.0          | 1-957-940-5980 | 23.0  | R               | 24697 FLORENCE WEST  | OH                   | 0.0              | 49513        | Kanno      | AMALITA     | m        | Salt Lake City | Canada                   |
| Din7       | 7.0                 |                | 680.0          | 1-768-633-4096 | 9.0   | Z               | 6488 applewood drive | Prince Edward Island | 2.0              | M5d 1v6      | Dinkel     | Ernesto     |          | Brownsville    | United States of America |
| Thi8       | 10.0                |                | 761.0          | 1-107-689-2155 | 63.0  |                 | 17404 gale court     | NV                   |                  | V6c 1q1      | Thibodeaux | Toby        |          | Escondido      | United States of America |
| May9       |                     |                | 416.0          | 1-173-594-6096 | 32.0  |                 | 15913 alexis street  | Ontario              | 2.0              | 99716        | Mayo       | evangelia   |          | Los Angeles    | United States of America |

TableB:
| prospect_AgeID   | prospect_NuCrCa   | prospect_AddrL2                                                   |   prospect_CreRat | prospect_Pho   |   prospect_A | prospect_MidIni   | prospect_AddrL1                                                             | prospect_St   | prospect_NuChi   | prospect_PosCo   |   prospect_In |   prospect_NumC | prospect_MariSta   | prospect_OwORF   | prospect_Em                    |   prospect_NeWor |
|:-----------------|:------------------|:------------------------------------------------------------------|------------------:|:---------------|-------------:|:------------------|:----------------------------------------------------------------------------|:--------------|:-----------------|:-----------------|--------------:|----------------:|:-------------------|:-----------------|:-------------------------------|-----------------:|
| Iok7501          |                   | GKOIKEZZMQTPQUQZLSAUUMVBDPAXTWNWSXTYJYQ                           |               580 | 1-637-119-9996 |            7 | n                 | jsurlejkapodmkaccruslfkcqmbcquahsyweopxdxknl                                | MO            |                  | Guudshirvcu      |         94490 |               3 | U                  | U                | FM Global                      | 321776           |
| tia7502          | 2.0               | ocmgcvnexhqhgoyrwpkgaopthdvandlzaaleqccjpjkbirtcqvorobgskhtlgndvn |               683 | 1-560-405-0048 |           48 |                   | Ggptcoorkpeeigqzevhwhjdxdfbrmidyxsugikhgmuvvpcptuphjlgmipvhrrsgepibdupa     | TX            | 4.0              | wyggjewbe        |          7037 |               4 | S                  | R                | MGIC Investment                |      2.29232e+06 |
| AOI7503          | 2.0               | Cdrxeolwrrxmwmhgexvcstvzz                                         |               411 | 1-261-306-5079 |           14 | u                 | Gpcvjzlwouagawronludakqiuhbrbpbkkltrnlkoezgwcawpayfsnejpkmisnryphbtztbfemoy | CT            | 5.0              | YMZRQICUTHT      |        419269 |               1 | M                  | O                | Ross Stores                    | 969707           |
| PJQ7504          | 9.0               | WKSBVOFGJHQGAEKUYRZHHPH                                           |               818 | 1-642-299-6655 |           29 |                   | Yxkhkvrobywpdczvwmjgxvnuduavcpyiuceglhaskahgyxqpqjbdroyojouqkzfwvfpsddisy   | UT            | 5.0              | Bcjuycmcen       |         76681 |               4 | W                  | U                |                                |      3.89946e+06 |
| SDV7505          | 7.0               | skxijfqpzshmts                                                    |               370 |                |           69 |                   | Ddsarhvraiskwmrddncqwvzkmjmxtgnpbtgyop                                      | RI            | 4.0              | Nujxguyehf       |        209116 |               2 | U                  | R                | Alliance One International     |      3.74922e+06 |
| Hga7506          | 6.0               | ZETOHHRKIBHCQCKZODIXJJSXCFY                                       |               833 | 1-388-257-4273 |           47 | F                 | Ajpkrmtlcbdzr                                                               | DE            | 0.0              | Neigswk          |        212203 |               0 | U                  | O                | Sally Beauty Holdings          |      3.65853e+06 |
| Beo7507          | 2.0               | LJXAXKUJXQBGWBHJJAAM                                              |               536 |                |            0 | D                 | PKSTPUXQIRGWSXSKWRAJTTNBAOLQKAAJFAPGWIHBWVCHOXLE                            | NM            | 5.0              | WNCEOQPLW        |         42018 |               5 | M                  | U                | Wisconsin Energy               |      1.73846e+06 |
| Qum7508          | 0.0               | Jmlgjkjbqhrudrkqrm                                                |               775 | 1-632-118-1891 |           46 |                   | gyhrpdbplficrfirmtavitgpfmhnnhvsuoqwxrulxlqrdqkzshqovucentrxlakgkpwbrgtd    | WV            | 0.0              | Cskdwtkf         |         90446 |               0 | S                  | R                | Carpenter Technology           |      3.3073e+06  |
| Hud7509          | 3.0               | Qqcilgblxyikgr                                                    |               765 | 1-853-806-4986 |            6 | v                 | GJTWIDOQOAPDVVULJGOOJBWTTANDJXOCQHWWZAGLGMJQXJOMWFTFVGXIH                   | NH            | 1.0              | tcxswloetdt      |         16274 |               1 | M                  | R                | Liberty Mutual Insurance Group |      1.81642e+06 |
| jba7510          | 6.0               | Ahtohqjfzfarn                                                     |               555 | 1-220-687-2027 |           22 |                   | Ycltsquohmuugxihqyluhkoy                                                    | WY            | 2.0              | Fkpemasoukih     |         22215 |               5 | M                  | O                | Black & Decker                 |      2.59925e+06 |



source_headers: AgencyID
NumberCreditCards
AddressLine2
CreditRating
Phone
Age
MiddleInitial
AddressLine1
State
NumberChildren
PostalCode
target_headers: prospect_AgeID
prospect_NuCrCa
prospect_AddrL2
prospect_CreRat
prospect_Pho
prospect_A
prospect_MidIni
prospect_AddrL1
prospect_St
prospect_NuChi
prospect_PosCo
column_mappings: AgencyID
prospect_AgeID
NumberCreditCards
prospect_NuCrCa
AddressLine2
prospect_AddrL2
CreditRating
prospect_CreRat
Phone
prospect_Pho
Age
prospect_A
MiddleInitial
prospect_MidIni
AddressLine1
prospect_AddrL1
State
prospect_St
NumberChildren
prospect_NuChi
PostalCode
prospect_PosCo
output: {"column_mappings": [["AgencyID", "prospect_AgeID"], ["NumberCreditCards", "prospect_NuCrCa"], ["AddressLine2", "prospect_AddrL2"], ["CreditRating", "prospect_CreRat"], ["Phone", "prospect_Pho"], ["Age", "prospect_A"], ["MiddleInitial", "prospect_MidIni"], ["AddressLine1", "prospect_AddrL1"], ["State", "prospect_St"], ["NumberChildren", "prospect_NuChi"], ["PostalCode", "prospect_PosCo"], ["LastName", null], ["FirstName", null], ["Gender", null], ["City", null], ["Country", null]]}