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   | NumberCars   | AddressLine2   |   Income | Age   | City           | Country                  | NumberCreditCards   | CreditRating   |         NetWorth | Phone          | LastName   | FirstName   | MiddleInitial   | Gender   | AddressLine1         |
|:-----------|:-------------|:---------------|---------:|:------|:---------------|:-------------------------|:--------------------|:---------------|-----------------:|:---------------|:-----------|:------------|:----------------|:---------|:---------------------|
| PEL0       |              |                |   368776 | 20.0  | Fairbanks      | United States of America |                     | 760.0          |      1.05887e+06 | 1-712-522-6088 | PELLAND    | Netti       |                 | f        | 21847 olympia street |
| LED1       | 5.0          | APT. 624       |   177967 | 3.0   | Quebec         | United States of America | 6.0                 | 555.0          |      1.98818e+06 | 1-626-426-4298 | LEDUC      | TRUDY       |                 | F        | 245 congress court   |
| lat2       | 2.0          |                |   321772 |       | Henderson      | United States of America | 6.0                 | 566.0          |      3.67313e+06 | 1-524-787-8784 | latif      | ireland     |                 |          | 6517 frailing west   |
| RUD3       | 2.0          |                |    25449 | 77.0  | Salem          | Canada                   | 3.0                 |                |      2.0059e+06  | 1-741-997-1688 | RUDDICK    | Misti       |                 |          | 11449 blalock park   |
| JAY4       | 0.0          | Apt. 619       |   166567 | 21.0  | Toledo         | Canada                   | 4.0                 | 815.0          | 624736           | 1-002-194-1991 | JAYAMANNE  | sarena      | M               | f        | 18354 dodd court     |
| tod5       | 1.0          |                |    43631 | 77.0  | Corpus Christi | United States of America | 10.0                | 333.0          |      3.06462e+06 | 1-441-371-7651 | todo       | Paulette    | Z               | M        | 14117 roxboro street |
| Kan6       | 4.0          |                |   466230 | 23.0  | Salt Lake City | Canada                   | 1.0                 | 528.0          |      3.48913e+06 | 1-957-940-5980 | Kanno      | AMALITA     | R               | m        | 24697 FLORENCE WEST  |
| Din7       | 2.0          |                |   420243 | 9.0   | Brownsville    | United States of America | 7.0                 | 680.0          |      3.43074e+06 | 1-768-633-4096 | Dinkel     | Ernesto     | Z               |          | 6488 applewood drive |
| Thi8       | 3.0          |                |   141862 | 63.0  | Escondido      | United States of America | 10.0                | 761.0          |      1.74361e+06 | 1-107-689-2155 | Thibodeaux | Toby        |                 |          | 17404 gale court     |
| May9       | 0.0          |                |   402011 | 32.0  | Los Angeles    | United States of America |                     | 416.0          | 216299           | 1-173-594-6096 | Mayo       | evangelia   |                 |          | 15913 alexis street  |

TableB:
| prospect_gncd   | prospect_nmbrcrs   | prospect_ddrssln2   |   prospect_ncm | prospect_g   | prospect_ct    | prospect_cntr            | prospect_nmbrcrdtcrds   | prospect_crdtrtng   |   prospect_ntwrth | prospect_phn   | prospect_pstlcd   | prospect_stt         | prospect_nmbrchldrn   | prospect_mrtlstts   | prospect_wnrrntflg   | prospect_mplr            |
|:----------------|:-------------------|:--------------------|---------------:|:-------------|:---------------|:-------------------------|:------------------------|:--------------------|------------------:|:---------------|:------------------|:---------------------|:----------------------|:--------------------|:---------------------|:-------------------------|
| PEL0            |                    |                     |         368776 | 20.0         | Fairbanks      | United States of America |                         | 760.0               |       1.05887e+06 | 1-712-522-6088 | T6b 1i1           | MA                   | 3.0                   | W                   | O                    | Brink's                  |
| LED1            | 5.0                | APT. 624            |         177967 | 3.0          | Quebec         | United States of America | 6.0                     | 555.0               |       1.98818e+06 | 1-626-426-4298 | 77281             | PA                   | 1.0                   | U                   | U                    |                          |
| lat2            | 2.0                |                     |         321772 |              | Henderson      | United States of America | 6.0                     | 566.0               |       3.67313e+06 | 1-524-787-8784 | 91355             | Alberta              | 1.0                   | S                   | O                    |                          |
| RUD3            | 2.0                |                     |          25449 | 77.0         | Salem          | Canada                   | 3.0                     |                     |       2.0059e+06  | 1-741-997-1688 | 36615             | AR                   | 1.0                   | W                   | O                    | Air Products & Chemicals |
| JAY4            | 0.0                | Apt. 619            |         166567 | 21.0         | Toledo         | Canada                   | 4.0                     | 815.0               |  624736           | 1-002-194-1991 | t6a 1i3           | OR                   | 3.0                   | M                   | O                    | Oshkosh                  |
| tod5            | 1.0                |                     |          43631 | 77.0         | Corpus Christi | United States of America | 10.0                    | 333.0               |       3.06462e+06 | 1-441-371-7651 | A2b 1v3           | VA                   | 4.0                   | M                   | R                    |                          |
| Kan6            | 4.0                |                     |         466230 | 23.0         | Salt Lake City | Canada                   | 1.0                     | 528.0               |       3.48913e+06 | 1-957-940-5980 | 49513             | OH                   | 0.0                   |                     | O                    | VeraSun Energy           |
| Din7            | 2.0                |                     |         420243 | 9.0          | Brownsville    | United States of America | 7.0                     | 680.0               |       3.43074e+06 | 1-768-633-4096 | M5d 1v6           | Prince Edward Island | 2.0                   | M                   | U                    | IDT                      |
| Thi8            | 3.0                |                     |         141862 | 63.0         | Escondido      | United States of America | 10.0                    | 761.0               |       1.74361e+06 | 1-107-689-2155 | V6c 1q1           | NV                   |                       | U                   | O                    | Adams Resources & Energy |
| May9            | 0.0                |                     |         402011 | 32.0         | Los Angeles    | United States of America |                         | 416.0               |  216299           | 1-173-594-6096 | 99716             | Ontario              | 2.0                   | M                   | O                    | MGIC Investment          |



source_headers: AgencyID
NumberCars
AddressLine2
Income
Age
City
Country
NumberCreditCards
CreditRating
NetWorth
Phone
target_headers: prospect_gncd
prospect_nmbrcrs
prospect_ddrssln2
prospect_ncm
prospect_g
prospect_ct
prospect_cntr
prospect_nmbrcrdtcrds
prospect_crdtrtng
prospect_ntwrth
prospect_phn
column_mappings: AgencyID
prospect_gncd
NumberCars
prospect_nmbrcrs
AddressLine2
prospect_ddrssln2
Income
prospect_ncm
Age
prospect_g
City
prospect_ct
Country
prospect_cntr
NumberCreditCards
prospect_nmbrcrdtcrds
CreditRating
prospect_crdtrtng
NetWorth
prospect_ntwrth
Phone
prospect_phn
output: {"column_mappings": [["AgencyID", "prospect_gncd"], ["NumberCars", "prospect_nmbrcrs"], ["AddressLine2", "prospect_ddrssln2"], ["Income", "prospect_ncm"], ["Age", "prospect_g"], ["City", "prospect_ct"], ["Country", "prospect_cntr"], ["NumberCreditCards", "prospect_nmbrcrdtcrds"], ["CreditRating", "prospect_crdtrtng"], ["NetWorth", "prospect_ntwrth"], ["Phone", "prospect_phn"], ["LastName", null], ["FirstName", null], ["MiddleInitial", null], ["Gender", null], ["AddressLine1", null]]}