Task: Data-Imputation (source dataset: WebTable)

Please fill in the missing value in the input table. The missing value is denoted by '[MISSING]'. Please only return the value filled in. Do not return the whole table.

No explanation, return the value filled in JSON format: {"value": "filled_value"}. 

Input Table:
| Station                             | Jurisdiction          | County        | Opened             | Other BART lines   |
|:------------------------------------|:----------------------|:--------------|:-------------------|:-------------------|
| Pittsburg / Bay Point               | Pittsburg / Bay Point | Contra Costa  | December 7, 1996   | eBART (2018)       |
| North Concord / Martinez            | Concord               | Contra Costa  | December 16, 1995  | nan                |
| Concord                             | Concord               | Contra Costa  | May 21, 1973       | nan                |
| Pleasant Hill / Contra Costa Centre | Contra Costa Centre   | Contra Costa  | May 21, 1973       | nan                |
| Walnut Creek                        | Walnut Creek          | Contra Costa  | May 21, 1973       | nan                |
| Lafayette                           | Lafayette             | Contra Costa  | May 21, 1973       | nan                |
| Orinda                              | Orinda                | Contra Costa  | May 21, 1973       | nan                |
| Rockridge                           | Oakland               | Alameda       | May 21, 1973       | nan                |
| MacArthur                           | Oakland               | Alameda       | September 11, 1972 | nan                |
| 19th Street Oakland                 | Oakland               | Alameda       | September 11, 1972 | nan                |
| 12th Street Oakland City Center     | Oakland               | Alameda       | September 11, 1972 | nan                |
| West Oakland                        | Oakland               | Alameda       | September 16, 1974 | nan                |
| Embarcadero                         | San Francisco         | San Francisco | May 27, 1976       | nan                |
| Montgomery Street                   | San Francisco         | San Francisco | November 5, 1973   | nan                |
| Powell Street                       | San Francisco         | San Francisco | November 5, 1973   | nan                |
| Civic Center / UN Plaza             | San Francisco         | San Francisco | November 5, 1973   | nan                |
| 16th Street Mission                 | San Francisco         | San Francisco | November 5, 1973   | nan                |
| 24th Street Mission                 | San Francisco         | San Francisco | November 5, 1973   | nan                |
| Glen Park                           | San Francisco         | San Francisco | November 5, 1973   | nan                |
| Balboa Park                         | San Francisco         | San Francisco | November 5, 1973   | nan                |
| Daly City                           | Daly City             | San Mateo     | November 5, 1973   | nan                |
| Colma                               | Colma                 | San Mateo     | February 24, 1996  | nan                |
| South San Francisco                 | South San Francisco   | San Mateo     | June 22, 2003      | nan                |
| San Bruno                           | San Bruno             | San Mateo     | June 22, 2003      | nan                |
| San Francisco International Airport | SFO                   | [MISSING]     | June 22, 2003      | nan                |
| Millbrae                            | Millbrae              | San Mateo     | June 22, 2003      | nan                |



row_idx: 24
col_idx: 2
col_name: County
label: San Mateo