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:
|   Number | TOPS Code   | Name         | Built          | Location                                 | Notes                                                                                                  |
|---------:|:------------|:-------------|:---------------|:-----------------------------------------|:-------------------------------------------------------------------------------------------------------|
|    80300 | NSX         | -            | 1959 Wolverton | Severn Valley Railway                    | First-built vehicle.                                                                                   |
|    80301 | NSX         | -            | 1959 Wolverton | Great Central Railway                    | -                                                                                                      |
|    80307 | NSX         | -            | 1959 Wolverton | Great Central Railway                    | -                                                                                                      |
|    80318 | NSX         | -            | 1961 Wolverton | Colne Valley Railway                     | Last vehicle built with large windows.                                                                 |
|    80327 | NSA         | George James | 1969 York      | Nene Valley Railway                      | -                                                                                                      |
|    80328 | NSA         | -            | 1969 York      | Severn Valley Railway                    | Used as Santa's Grotto at Arley during December, kept in Kidderminster Carriage Shed for rest of year. |
|    80329 | NSA         | -            | 1969 York      | Severn Valley Railway                    | Used as Santa's Grotto at Arley during December, kept in Kidderminster Carriage Shed for rest of year. |
|    80334 | NSA         | -            | 1969 York      | Rushden, Higham & Wellingborough Railway | -                                                                                                      |
|    80337 | NSA         | Brian White  | 1969 York      | Nene Valley Railway                      | -                                                                                                      |
|    80345 | NSA         | Richard Yeo  | 1969 York      | Great Central Railway                    | -                                                                                                      |
|    80349 | NSA         | -            | 1969 York      | Great Central Railway                    | -                                                                                                      |
|    80371 | NSA         | -            | 1973 York      | Gwili Railway                            | -                                                                                                      |
|    80374 | [MISSING]   | -            | 1973 York      | Battlefield Line Railway                 | -                                                                                                      |
|    80382 | NSA         | -            | 1977 Wolverton | Bo'ness and Kinneil Railway              | Rebuilt from SK 25109. Last vehicle ever overhauled by EWS.                                            |
|    80394 | NSA         | -            | 1977 Wolverton | Buckinghamshire Railway Centre           | Rebuilt from SK 25156.                                                                                 |



row_idx: 12
col_idx: 1
col_name: TOPS Code
label: NSA