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   | City           | Gender   | PostalCode   | Phone          | NumberChildren   | OwnOrRentFlag   |   Income | AddressLine1         | LastName   | MiddleInitial   | Employer                 | Country                  |         NetWorth | FirstName   | AddressLine2   | State                |
|:-----------|:---------------|:---------------|:---------|:-------------|:---------------|:-----------------|:----------------|---------:|:---------------------|:-----------|:----------------|:-------------------------|:-------------------------|-----------------:|:------------|:---------------|:---------------------|
| PEL0       | 760.0          | Fairbanks      | f        | T6b 1i1      | 1-712-522-6088 | 3.0              | O               |   368776 | 21847 olympia street | PELLAND    |                 | Brink's                  | United States of America |      1.05887e+06 | Netti       |                | MA                   |
| LED1       | 555.0          | Quebec         | F        | 77281        | 1-626-426-4298 | 1.0              | U               |   177967 | 245 congress court   | LEDUC      |                 |                          | United States of America |      1.98818e+06 | TRUDY       | APT. 624       | PA                   |
| lat2       | 566.0          | Henderson      |          | 91355        | 1-524-787-8784 | 1.0              | O               |   321772 | 6517 frailing west   | latif      |                 |                          | United States of America |      3.67313e+06 | ireland     |                | Alberta              |
| RUD3       |                | Salem          |          | 36615        | 1-741-997-1688 | 1.0              | O               |    25449 | 11449 blalock park   | RUDDICK    |                 | Air Products & Chemicals | Canada                   |      2.0059e+06  | Misti       |                | AR                   |
| JAY4       | 815.0          | Toledo         | f        | t6a 1i3      | 1-002-194-1991 | 3.0              | O               |   166567 | 18354 dodd court     | JAYAMANNE  | M               | Oshkosh                  | Canada                   | 624736           | sarena      | Apt. 619       | OR                   |
| tod5       | 333.0          | Corpus Christi | M        | A2b 1v3      | 1-441-371-7651 | 4.0              | R               |    43631 | 14117 roxboro street | todo       | Z               |                          | United States of America |      3.06462e+06 | Paulette    |                | VA                   |
| Kan6       | 528.0          | Salt Lake City | m        | 49513        | 1-957-940-5980 | 0.0              | O               |   466230 | 24697 FLORENCE WEST  | Kanno      | R               | VeraSun Energy           | Canada                   |      3.48913e+06 | AMALITA     |                | OH                   |
| Din7       | 680.0          | Brownsville    |          | M5d 1v6      | 1-768-633-4096 | 2.0              | U               |   420243 | 6488 applewood drive | Dinkel     | Z               | IDT                      | United States of America |      3.43074e+06 | Ernesto     |                | Prince Edward Island |
| Thi8       | 761.0          | Escondido      |          | V6c 1q1      | 1-107-689-2155 |                  | O               |   141862 | 17404 gale court     | Thibodeaux |                 | Adams Resources & Energy | United States of America |      1.74361e+06 | Toby        |                | NV                   |
| May9       | 416.0          | Los Angeles    |          | 99716        | 1-173-594-6096 | 2.0              | O               |   402011 | 15913 alexis street  | Mayo       |                 | MGIC Investment          | United States of America | 216299           | evangelia   |                | Ontario              |

TableB:
| gncd    |   crdtrtng | ct         | gndr   | pstlcd       | phn            | nmbrchldrn   | wnrrntflg   |    ncm | ddrssln1                                                                    | lstnm                         | mddlntl   | mplr                           | cntr                     |           ntwrth |   nmbrcrs | mrtlstts   |   g | nmbrcrdtcrds   |
|:--------|-----------:|:-----------|:-------|:-------------|:---------------|:-------------|:------------|-------:|:----------------------------------------------------------------------------|:------------------------------|:----------|:-------------------------------|:-------------------------|-----------------:|----------:|:-----------|----:|:---------------|
| Iok7501 |        580 | Baltimore  |        | Guudshirvcu  | 1-637-119-9996 |              | U           |  94490 | jsurlejkapodmkaccruslfkcqmbcquahsyweopxdxknl                                | Iokwiqojocjanndatkdzgymym     | n         | FM Global                      | United States of America | 321776           |         3 | U          |   7 |                |
| tia7502 |        683 | Kitchener  | M      | wyggjewbe    | 1-560-405-0048 | 4.0          | R           |   7037 | Ggptcoorkpeeigqzevhwhjdxdfbrmidyxsugikhgmuvvpcptuphjlgmipvhrrsgepibdupa     | tiabxgseasiibxakctfzhfwotp    |           | MGIC Investment                | Canada                   |      2.29232e+06 |         4 | S          |  48 | 2.0            |
| AOI7503 |        411 | Saint John |        | YMZRQICUTHT  | 1-261-306-5079 | 5.0          | O           | 419269 | Gpcvjzlwouagawronludakqiuhbrbpbkkltrnlkoezgwcawpayfsnejpkmisnryphbtztbfemoy | AOIWIWTIHIXOJ                 | u         | Ross Stores                    |                          | 969707           |         1 | M          |  14 | 2.0            |
| PJQ7504 |        818 | Berkeley   | m      | Bcjuycmcen   | 1-642-299-6655 | 5.0          | U           |  76681 | Yxkhkvrobywpdczvwmjgxvnuduavcpyiuceglhaskahgyxqpqjbdroyojouqkzfwvfpsddisy   | PJQSPMBUHYQKBOZ               |           |                                | United States of America |      3.89946e+06 |         4 | W          |  29 | 9.0            |
| SDV7505 |        370 | Missoula   |        | Nujxguyehf   |                | 4.0          | R           | 209116 | Ddsarhvraiskwmrddncqwvzkmjmxtgnpbtgyop                                      | SDVLJWXENNGWCQMIW             |           | Alliance One International     | United States of America |      3.74922e+06 |         2 | U          |  69 | 7.0            |
| Hga7506 |        833 | Salinas    | F      | Neigswk      | 1-388-257-4273 | 0.0          | O           | 212203 | Ajpkrmtlcbdzr                                                               | Hgakmykzeunwkiaxayulpwyxrcuev | F         | Sally Beauty Holdings          |                          |      3.65853e+06 |         0 | U          |  47 | 6.0            |
| Beo7507 |        536 | San Jose   | M      | WNCEOQPLW    |                | 5.0          | U           |  42018 | PKSTPUXQIRGWSXSKWRAJTTNBAOLQKAAJFAPGWIHBWVCHOXLE                            | Beotomyndkiqryllkvpavllytov   | D         | Wisconsin Energy               | Canada                   |      1.73846e+06 |         5 | M          |   0 | 2.0            |
| Qum7508 |        775 | Cleveland  |        | Cskdwtkf     | 1-632-118-1891 | 0.0          | R           |  90446 | gyhrpdbplficrfirmtavitgpfmhnnhvsuoqwxrulxlqrdqkzshqovucentrxlakgkpwbrgtd    | Qumxrssnd                     |           | Carpenter Technology           | United States of America |      3.3073e+06  |         0 | S          |  46 | 0.0            |
| Hud7509 |        765 | Huntington |        | tcxswloetdt  | 1-853-806-4986 | 1.0          | R           |  16274 | GJTWIDOQOAPDVVULJGOOJBWTTANDJXOCQHWWZAGLGMJQXJOMWFTFVGXIH                   | Hudlpfwjagzbnznyhamjkhbf      | v         | Liberty Mutual Insurance Group | United States of America |      1.81642e+06 |         1 | M          |   6 | 3.0            |
| jba7510 |        555 | Paterson   | m      | Fkpemasoukih | 1-220-687-2027 | 2.0          | O           |  22215 | Ycltsquohmuugxihqyluhkoy                                                    | jbabemsfwdyeihxq              |           | Black & Decker                 | Canada                   |      2.59925e+06 |         5 | M          |  22 | 6.0            |



source_headers: AgencyID
CreditRating
City
Gender
PostalCode
Phone
NumberChildren
OwnOrRentFlag
Income
AddressLine1
LastName
MiddleInitial
Employer
Country
NetWorth
target_headers: gncd
crdtrtng
ct
gndr
pstlcd
phn
nmbrchldrn
wnrrntflg
ncm
ddrssln1
lstnm
mddlntl
mplr
cntr
ntwrth
column_mappings: AgencyID
gncd
CreditRating
crdtrtng
City
ct
Gender
gndr
PostalCode
pstlcd
Phone
phn
NumberChildren
nmbrchldrn
OwnOrRentFlag
wnrrntflg
Income
ncm
AddressLine1
ddrssln1
LastName
lstnm
MiddleInitial
mddlntl
Employer
mplr
Country
cntr
NetWorth
ntwrth
output: {"column_mappings": [["AgencyID", "gncd"], ["CreditRating", "crdtrtng"], ["City", "ct"], ["Gender", "gndr"], ["PostalCode", "pstlcd"], ["Phone", "phn"], ["NumberChildren", "nmbrchldrn"], ["OwnOrRentFlag", "wnrrntflg"], ["Income", "ncm"], ["AddressLine1", "ddrssln1"], ["LastName", "lstnm"], ["MiddleInitial", "mddlntl"], ["Employer", "mplr"], ["Country", "cntr"], ["NetWorth", "ntwrth"], ["FirstName", null], ["AddressLine2", null], ["State", null]]}