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   | MiddleInitial   | Gender   | OwnOrRentFlag   |   Income | Country               | AddressLine2   | AddressLine1       | State              | MaritalStatus   | City          | Phone          | NumberCreditCards   | LastName   | FirstName   | NumberCars   | NumberChildren   |
|:-----------|:-------------|:----------------|:---------|:----------------|---------:|:----------------------|:---------------|:-------------------|:-------------------|:----------------|:--------------|:---------------|:--------------------|:-----------|:------------|:-------------|:-----------------|
| PEL0       | T6b181       |                 | f        | O               |    93628 | Un9tddStateqifAmerica |                | 21747olymoiasrreet | MA                 | W               | Fairbanis     | 1 712 522 6088 |                     | PELLsND    | Netti       |              | 3.0              |
| LED1       | 77281        |                 | F        | U               |   159141 | Uni5edStagdsofwmerica | sPT624         | 246cong5essciurt   | PA                 | U               | Quebsc        | 1 626 426 4298 | 13.0                | LEeUC      | TRUDY       | 5.0          | 1.0              |
| lat2       | 91355        |                 |          | O               |    46491 | UniteddyateaorAmerica |                | 6517fraklibfwest   | Alb3rta            | S               | Henderskn     | 1 524 787 8784 | 5.0                 | lwtif      | ireland     | 2.0          | 1.0              |
| RUD3       | 36615        |                 |          | O               |    34829 | Canara                |                | 11449blakock0adk   | AR                 | W               | Saleh         | 1 741 997 1688 | 1.0                 | R7DDICK    | Misti       | 2.0          | 1.0              |
| JAY4       | t6z1i3       | M               | f        | O               |   455666 | Canaca                | Apt6q9         | 19254doddcourt     | OR                 | M               | Toled0        | 1 002 194 1991 | 12.0                | JAYAMANNw  | sarena      | 0.0          | 3.0              |
| tod5       | x2b1v3       | Z               | M        | R               |    58900 | UnitdwStates9fAjerica |                | q4117roxhorostree4 | VA                 | M               | CorpuxChridti | 1 441 371 7651 | 12.0                | todo       | Paulette    | 1.0          | 4.0              |
| Kan6       | 49513        | R               | m        | O               |    86615 | Canadw                |                | 24697FLORENvw2EST  | OH                 |                 | SaltLxkdCity  | 1 957 940 5980 | 14.0                | Kznno      | AMALITA     | 4.0          | 0.0              |
| Din7       | j5d1v6       | Z               |          | U               |    28540 | UnitedStzteqofAker7ca |                | 6488applewoodsr7vd | PrinceEdwqedIslahd | M               | Brownxviile   | 1 768 633 4096 | 6.0                 | Diniel     | Ernesto     | 2.0          | 2.0              |
| Thi8       | d6c1q1       |                 |          | O               |   215435 | Ubi6edSta5fsofAmerica |                | 17404vapecourt     | NV                 | U               | Escondifo     | 1 107 689 2155 | 4.0                 | fhibodexux | Toby        | 3.0          |                  |
| May9       | 99716        |                 |          | O               |   309825 | UnitewStatesofxkericw |                | 15913apeciastreet  | Onta4io            | M               | L9sAhgeles    | 1 173 594 6096 |                     | Mayo       | evangelia   | 0.0          | 2.0              |

TableB:
| gncd   | pstlcd   | mddlntl   | gndr   | wnrrntflg   |    ncm | cntr                     | ddrssln2   | ddrssln1             | stt                  | mrtlstts   | ct             | phn            | nmbrcrdtcrds   | lstnm      | g    | crdtrtng   | mplr                     |           ntwrth |
|:-------|:---------|:----------|:-------|:------------|-------:|:-------------------------|:-----------|:---------------------|:---------------------|:-----------|:---------------|:---------------|:---------------|:-----------|:-----|:-----------|:-------------------------|-----------------:|
| PEL0   | T6b 1i1  |           | f      | O           | 368776 | United States of America |            | 21847 olympia street | MA                   | W          | Fairbanks      | 1-712-522-6088 |                | PELLAND    | 20.0 | 760.0      | Brink's                  |      1.05887e+06 |
| LED1   | 77281    |           | F      | U           | 177967 | United States of America | APT. 624   | 245 congress court   | PA                   | U          | Quebec         | 1-626-426-4298 | 6.0            | LEDUC      | 3.0  | 555.0      |                          |      1.98818e+06 |
| lat2   | 91355    |           |        | O           | 321772 | United States of America |            | 6517 frailing west   | Alberta              | S          | Henderson      | 1-524-787-8784 | 6.0            | latif      |      | 566.0      |                          |      3.67313e+06 |
| RUD3   | 36615    |           |        | O           |  25449 | Canada                   |            | 11449 blalock park   | AR                   | W          | Salem          | 1-741-997-1688 | 3.0            | RUDDICK    | 77.0 |            | Air Products & Chemicals |      2.0059e+06  |
| JAY4   | t6a 1i3  | M         | f      | O           | 166567 | Canada                   | Apt. 619   | 18354 dodd court     | OR                   | M          | Toledo         | 1-002-194-1991 | 4.0            | JAYAMANNE  | 21.0 | 815.0      | Oshkosh                  | 624736           |
| tod5   | A2b 1v3  | Z         | M      | R           |  43631 | United States of America |            | 14117 roxboro street | VA                   | M          | Corpus Christi | 1-441-371-7651 | 10.0           | todo       | 77.0 | 333.0      |                          |      3.06462e+06 |
| Kan6   | 49513    | R         | m      | O           | 466230 | Canada                   |            | 24697 FLORENCE WEST  | OH                   |            | Salt Lake City | 1-957-940-5980 | 1.0            | Kanno      | 23.0 | 528.0      | VeraSun Energy           |      3.48913e+06 |
| Din7   | M5d 1v6  | Z         |        | U           | 420243 | United States of America |            | 6488 applewood drive | Prince Edward Island | M          | Brownsville    | 1-768-633-4096 | 7.0            | Dinkel     | 9.0  | 680.0      | IDT                      |      3.43074e+06 |
| Thi8   | V6c 1q1  |           |        | O           | 141862 | United States of America |            | 17404 gale court     | NV                   | U          | Escondido      | 1-107-689-2155 | 10.0           | Thibodeaux | 63.0 | 761.0      | Adams Resources & Energy |      1.74361e+06 |
| May9   | 99716    |           |        | O           | 402011 | United States of America |            | 15913 alexis street  | Ontario              | M          | Los Angeles    | 1-173-594-6096 |                | Mayo       | 32.0 | 416.0      | MGIC Investment          | 216299           |



source_headers: AgencyID
PostalCode
MiddleInitial
Gender
OwnOrRentFlag
Income
Country
AddressLine2
AddressLine1
State
MaritalStatus
City
Phone
NumberCreditCards
LastName
target_headers: gncd
pstlcd
mddlntl
gndr
wnrrntflg
ncm
cntr
ddrssln2
ddrssln1
stt
mrtlstts
ct
phn
nmbrcrdtcrds
lstnm
column_mappings: AgencyID
gncd
PostalCode
pstlcd
MiddleInitial
mddlntl
Gender
gndr
OwnOrRentFlag
wnrrntflg
Income
ncm
Country
cntr
AddressLine2
ddrssln2
AddressLine1
ddrssln1
State
stt
MaritalStatus
mrtlstts
City
ct
Phone
phn
NumberCreditCards
nmbrcrdtcrds
LastName
lstnm
output: {"column_mappings": [["AgencyID", "gncd"], ["PostalCode", "pstlcd"], ["MiddleInitial", "mddlntl"], ["Gender", "gndr"], ["OwnOrRentFlag", "wnrrntflg"], ["Income", "ncm"], ["Country", "cntr"], ["AddressLine2", "ddrssln2"], ["AddressLine1", "ddrssln1"], ["State", "stt"], ["MaritalStatus", "mrtlstts"], ["City", "ct"], ["Phone", "phn"], ["NumberCreditCards", "nmbrcrdtcrds"], ["LastName", "lstnm"], ["FirstName", null], ["NumberCars", null], ["NumberChildren", null]]}