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   |         NetWorth | FirstName   | MiddleInitial   | CreditRating   | LastName   | NumberCars   | Employer                 | Phone          | City           | AddressLine1         | AddressLine2   | Country                  | Age   | MaritalStatus   | Gender   | PostalCode   | State                |
|:-----------|-----------------:|:------------|:----------------|:---------------|:-----------|:-------------|:-------------------------|:---------------|:---------------|:---------------------|:---------------|:-------------------------|:------|:----------------|:---------|:-------------|:---------------------|
| PEL0       |      1.05887e+06 | Netti       |                 | 760.0          | PELLAND    |              | Brink's                  | 1-712-522-6088 | Fairbanks      | 21847 olympia street |                | United States of America | 20.0  | W               | f        | T6b 1i1      | MA                   |
| LED1       |      1.98818e+06 | TRUDY       |                 | 555.0          | LEDUC      | 5.0          |                          | 1-626-426-4298 | Quebec         | 245 congress court   | APT. 624       | United States of America | 3.0   | U               | F        | 77281        | PA                   |
| lat2       |      3.67313e+06 | ireland     |                 | 566.0          | latif      | 2.0          |                          | 1-524-787-8784 | Henderson      | 6517 frailing west   |                | United States of America |       | S               |          | 91355        | Alberta              |
| RUD3       |      2.0059e+06  | Misti       |                 |                | RUDDICK    | 2.0          | Air Products & Chemicals | 1-741-997-1688 | Salem          | 11449 blalock park   |                | Canada                   | 77.0  | W               |          | 36615        | AR                   |
| JAY4       | 624736           | sarena      | M               | 815.0          | JAYAMANNE  | 0.0          | Oshkosh                  | 1-002-194-1991 | Toledo         | 18354 dodd court     | Apt. 619       | Canada                   | 21.0  | M               | f        | t6a 1i3      | OR                   |
| tod5       |      3.06462e+06 | Paulette    | Z               | 333.0          | todo       | 1.0          |                          | 1-441-371-7651 | Corpus Christi | 14117 roxboro street |                | United States of America | 77.0  | M               | M        | A2b 1v3      | VA                   |
| Kan6       |      3.48913e+06 | AMALITA     | R               | 528.0          | Kanno      | 4.0          | VeraSun Energy           | 1-957-940-5980 | Salt Lake City | 24697 FLORENCE WEST  |                | Canada                   | 23.0  |                 | m        | 49513        | OH                   |
| Din7       |      3.43074e+06 | Ernesto     | Z               | 680.0          | Dinkel     | 2.0          | IDT                      | 1-768-633-4096 | Brownsville    | 6488 applewood drive |                | United States of America | 9.0   | M               |          | M5d 1v6      | Prince Edward Island |
| Thi8       |      1.74361e+06 | Toby        |                 | 761.0          | Thibodeaux | 3.0          | Adams Resources & Energy | 1-107-689-2155 | Escondido      | 17404 gale court     |                | United States of America | 63.0  | U               |          | V6c 1q1      | NV                   |
| May9       | 216299           | evangelia   |                 | 416.0          | Mayo       | 0.0          | MGIC Investment          | 1-173-594-6096 | Los Angeles    | 15913 alexis street  |                | United States of America | 32.0  | M               |          | 99716        | Ontario              |

TableB:
| gncd   |           ntwrth | frstnm    | mddlntl   | crdtrtng   | lstnm      | nmbrcrs   | mplr                     | phn            | ct             | ddrssln1             | ddrssln2   | cntr                     | g    | mrtlstts   |    ncm | nmbrchldrn   | wnrrntflg   | nmbrcrdtcrds   |
|:-------|-----------------:|:----------|:----------|:-----------|:-----------|:----------|:-------------------------|:---------------|:---------------|:---------------------|:-----------|:-------------------------|:-----|:-----------|-------:|:-------------|:------------|:---------------|
| PEL0   |      1.05887e+06 | Netti     |           | 760.0      | PELLAND    |           | Brink's                  | 1-712-522-6088 | Fairbanks      | 21847 olympia street |            | United States of America | 20.0 | W          | 368776 | 3.0          | O           |                |
| LED1   |      1.98818e+06 | TRUDY     |           | 555.0      | LEDUC      | 5.0       |                          | 1-626-426-4298 | Quebec         | 245 congress court   | APT. 624   | United States of America | 3.0  | U          | 177967 | 1.0          | U           | 6.0            |
| lat2   |      3.67313e+06 | ireland   |           | 566.0      | latif      | 2.0       |                          | 1-524-787-8784 | Henderson      | 6517 frailing west   |            | United States of America |      | S          | 321772 | 1.0          | O           | 6.0            |
| RUD3   |      2.0059e+06  | Misti     |           |            | RUDDICK    | 2.0       | Air Products & Chemicals | 1-741-997-1688 | Salem          | 11449 blalock park   |            | Canada                   | 77.0 | W          |  25449 | 1.0          | O           | 3.0            |
| JAY4   | 624736           | sarena    | M         | 815.0      | JAYAMANNE  | 0.0       | Oshkosh                  | 1-002-194-1991 | Toledo         | 18354 dodd court     | Apt. 619   | Canada                   | 21.0 | M          | 166567 | 3.0          | O           | 4.0            |
| tod5   |      3.06462e+06 | Paulette  | Z         | 333.0      | todo       | 1.0       |                          | 1-441-371-7651 | Corpus Christi | 14117 roxboro street |            | United States of America | 77.0 | M          |  43631 | 4.0          | R           | 10.0           |
| Kan6   |      3.48913e+06 | AMALITA   | R         | 528.0      | Kanno      | 4.0       | VeraSun Energy           | 1-957-940-5980 | Salt Lake City | 24697 FLORENCE WEST  |            | Canada                   | 23.0 |            | 466230 | 0.0          | O           | 1.0            |
| Din7   |      3.43074e+06 | Ernesto   | Z         | 680.0      | Dinkel     | 2.0       | IDT                      | 1-768-633-4096 | Brownsville    | 6488 applewood drive |            | United States of America | 9.0  | M          | 420243 | 2.0          | U           | 7.0            |
| Thi8   |      1.74361e+06 | Toby      |           | 761.0      | Thibodeaux | 3.0       | Adams Resources & Energy | 1-107-689-2155 | Escondido      | 17404 gale court     |            | United States of America | 63.0 | U          | 141862 |              | O           | 10.0           |
| May9   | 216299           | evangelia |           | 416.0      | Mayo       | 0.0       | MGIC Investment          | 1-173-594-6096 | Los Angeles    | 15913 alexis street  |            | United States of America | 32.0 | M          | 402011 | 2.0          | O           |                |



source_headers: AgencyID
NetWorth
FirstName
MiddleInitial
CreditRating
LastName
NumberCars
Employer
Phone
City
AddressLine1
AddressLine2
Country
Age
MaritalStatus
target_headers: gncd
ntwrth
frstnm
mddlntl
crdtrtng
lstnm
nmbrcrs
mplr
phn
ct
ddrssln1
ddrssln2
cntr
g
mrtlstts
column_mappings: AgencyID
gncd
NetWorth
ntwrth
FirstName
frstnm
MiddleInitial
mddlntl
CreditRating
crdtrtng
LastName
lstnm
NumberCars
nmbrcrs
Employer
mplr
Phone
phn
City
ct
AddressLine1
ddrssln1
AddressLine2
ddrssln2
Country
cntr
Age
g
MaritalStatus
mrtlstts
output: {"column_mappings": [["AgencyID", "gncd"], ["NetWorth", "ntwrth"], ["FirstName", "frstnm"], ["MiddleInitial", "mddlntl"], ["CreditRating", "crdtrtng"], ["LastName", "lstnm"], ["NumberCars", "nmbrcrs"], ["Employer", "mplr"], ["Phone", "phn"], ["City", "ct"], ["AddressLine1", "ddrssln1"], ["AddressLine2", "ddrssln2"], ["Country", "cntr"], ["Age", "g"], ["MaritalStatus", "mrtlstts"], ["Gender", null], ["PostalCode", null], ["State", null]]}