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   | Employer                 |   Income | NumberCreditCards   | Phone          | State                | City           |         NetWorth | CreditRating   | Gender   | AddressLine2   | FirstName   | PostalCode   | AddressLine1         | MiddleInitial   | LastName   | Country                  | NumberCars   |
|:-----------|:-------------------------|---------:|:--------------------|:---------------|:---------------------|:---------------|-----------------:|:---------------|:---------|:---------------|:------------|:-------------|:---------------------|:----------------|:-----------|:-------------------------|:-------------|
| PEL0       | Brink's                  |   368776 |                     | 1-712-522-6088 | MA                   | Fairbanks      |      1.05887e+06 | 760.0          | f        |                | Netti       | T6b 1i1      | 21847 olympia street |                 | PELLAND    | United States of America |              |
| LED1       |                          |   177967 | 6.0                 | 1-626-426-4298 | PA                   | Quebec         |      1.98818e+06 | 555.0          | F        | APT. 624       | TRUDY       | 77281        | 245 congress court   |                 | LEDUC      | United States of America | 5.0          |
| lat2       |                          |   321772 | 6.0                 | 1-524-787-8784 | Alberta              | Henderson      |      3.67313e+06 | 566.0          |          |                | ireland     | 91355        | 6517 frailing west   |                 | latif      | United States of America | 2.0          |
| RUD3       | Air Products & Chemicals |    25449 | 3.0                 | 1-741-997-1688 | AR                   | Salem          |      2.0059e+06  |                |          |                | Misti       | 36615        | 11449 blalock park   |                 | RUDDICK    | Canada                   | 2.0          |
| JAY4       | Oshkosh                  |   166567 | 4.0                 | 1-002-194-1991 | OR                   | Toledo         | 624736           | 815.0          | f        | Apt. 619       | sarena      | t6a 1i3      | 18354 dodd court     | M               | JAYAMANNE  | Canada                   | 0.0          |
| tod5       |                          |    43631 | 10.0                | 1-441-371-7651 | VA                   | Corpus Christi |      3.06462e+06 | 333.0          | M        |                | Paulette    | A2b 1v3      | 14117 roxboro street | Z               | todo       | United States of America | 1.0          |
| Kan6       | VeraSun Energy           |   466230 | 1.0                 | 1-957-940-5980 | OH                   | Salt Lake City |      3.48913e+06 | 528.0          | m        |                | AMALITA     | 49513        | 24697 FLORENCE WEST  | R               | Kanno      | Canada                   | 4.0          |
| Din7       | IDT                      |   420243 | 7.0                 | 1-768-633-4096 | Prince Edward Island | Brownsville    |      3.43074e+06 | 680.0          |          |                | Ernesto     | M5d 1v6      | 6488 applewood drive | Z               | Dinkel     | United States of America | 2.0          |
| Thi8       | Adams Resources & Energy |   141862 | 10.0                | 1-107-689-2155 | NV                   | Escondido      |      1.74361e+06 | 761.0          |          |                | Toby        | V6c 1q1      | 17404 gale court     |                 | Thibodeaux | United States of America | 3.0          |
| May9       | MGIC Investment          |   402011 |                     | 1-173-594-6096 | Ontario              | Los Angeles    | 216299           | 416.0          |          |                | evangelia   | 99716        | 15913 alexis street  |                 | Mayo       | United States of America | 0.0          |

TableB:
| prospect_gncd   | prospect_mplr            |   prospect_ncm | prospect_nmbrcrdtcrds   | prospect_phn   | prospect_stt         | prospect_ct    |   prospect_ntwrth | prospect_crdtrtng   | prospect_gndr   | prospect_ddrssln2   | prospect_frstnm   | prospect_pstlcd   | prospect_ddrssln1    | prospect_mddlntl   | prospect_nmbrchldrn   | prospect_mrtlstts   | prospect_g   | prospect_wnrrntflg   |
|:----------------|:-------------------------|---------------:|:------------------------|:---------------|:---------------------|:---------------|------------------:|:--------------------|:----------------|:--------------------|:------------------|:------------------|:---------------------|:-------------------|:----------------------|:--------------------|:-------------|:---------------------|
| PEL0            | Brink's                  |         368776 |                         | 1-712-522-6088 | MA                   | Fairbanks      |       1.05887e+06 | 760.0               | f               |                     | Netti             | T6b 1i1           | 21847 olympia street |                    | 3.0                   | W                   | 20.0         | O                    |
| LED1            |                          |         177967 | 6.0                     | 1-626-426-4298 | PA                   | Quebec         |       1.98818e+06 | 555.0               | F               | APT. 624            | TRUDY             | 77281             | 245 congress court   |                    | 1.0                   | U                   | 3.0          | U                    |
| lat2            |                          |         321772 | 6.0                     | 1-524-787-8784 | Alberta              | Henderson      |       3.67313e+06 | 566.0               |                 |                     | ireland           | 91355             | 6517 frailing west   |                    | 1.0                   | S                   |              | O                    |
| RUD3            | Air Products & Chemicals |          25449 | 3.0                     | 1-741-997-1688 | AR                   | Salem          |       2.0059e+06  |                     |                 |                     | Misti             | 36615             | 11449 blalock park   |                    | 1.0                   | W                   | 77.0         | O                    |
| JAY4            | Oshkosh                  |         166567 | 4.0                     | 1-002-194-1991 | OR                   | Toledo         |  624736           | 815.0               | f               | Apt. 619            | sarena            | t6a 1i3           | 18354 dodd court     | M                  | 3.0                   | M                   | 21.0         | O                    |
| tod5            |                          |          43631 | 10.0                    | 1-441-371-7651 | VA                   | Corpus Christi |       3.06462e+06 | 333.0               | M               |                     | Paulette          | A2b 1v3           | 14117 roxboro street | Z                  | 4.0                   | M                   | 77.0         | R                    |
| Kan6            | VeraSun Energy           |         466230 | 1.0                     | 1-957-940-5980 | OH                   | Salt Lake City |       3.48913e+06 | 528.0               | m               |                     | AMALITA           | 49513             | 24697 FLORENCE WEST  | R                  | 0.0                   |                     | 23.0         | O                    |
| Din7            | IDT                      |         420243 | 7.0                     | 1-768-633-4096 | Prince Edward Island | Brownsville    |       3.43074e+06 | 680.0               |                 |                     | Ernesto           | M5d 1v6           | 6488 applewood drive | Z                  | 2.0                   | M                   | 9.0          | U                    |
| Thi8            | Adams Resources & Energy |         141862 | 10.0                    | 1-107-689-2155 | NV                   | Escondido      |       1.74361e+06 | 761.0               |                 |                     | Toby              | V6c 1q1           | 17404 gale court     |                    |                       | U                   | 63.0         | O                    |
| May9            | MGIC Investment          |         402011 |                         | 1-173-594-6096 | Ontario              | Los Angeles    |  216299           | 416.0               |                 |                     | evangelia         | 99716             | 15913 alexis street  |                    | 2.0                   | M                   | 32.0         | O                    |



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