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:
| Pos   | No.       | Driver           | Entrant                   | Car / Engine                                             |   Laps | Time       |
|:------|:----------|:-----------------|:--------------------------|:---------------------------------------------------------|-------:|:-----------|
| 1     | 4         | Lex Davison      | B.S. Stillwell            | Cooper T51 / Coventry Climax FPF 2.2L                    |     50 | 1h 29m 01s |
| 2     | 6         | Bib Stillwell    | B.S. Stillwell            | Cooper T55 / Coventry Climax FPF 2.5L                    |     50 | 1h 29m 42s |
| 3     | 14        | David McKay      | Scuderia Veloce           | Cooper T51 / Coventry Climax FPF 2.5L                    |     50 | 1h 30m 05s |
| 4     | 9         | Bill Patterson   | Bill Patterson Motors P/L | Cooper T51 / Coventry Climax FPF 2.5L                    |     48 | nan        |
| 5     | 15        | Murray Trenberth | M Trembarth               | Alta / Holden 2.5L                                       |     46 | nan        |
| 6     | 20        | Eddie Clay       | E Clay                    | Cooper T23 / Bristol 2.2L                                |     45 | nan        |
| 7     | 26        | Alan Jack        | Briefield Motors          | Cooper T39 / Coventry Climax FWB 1.5L                    |     48 | nan        |
| 8     | 45        | Trevor Ellis     | T Ellis                   | Austin 8 Special / Austin Supercharged 0.9L              |     38 | nan        |
| 9     | 16        | Mel McEwin       | M McEwin                  | Tornado Mk II / Chevrolet 4.6L                           |     35 | nan        |
| 10    | 60        | Peter Wilkinson  | P Wilkinson               | Elfin Steamliner / Ford 1.2L                             |     35 | nan        |
| Ret   | 5         | John Youl        | Scuderia Veloce           | Cooper T51 / Coventry Climax FPF 2.5L                    |     46 | Exhaustion |
| Ret   | 8         | Keith Rilstone   | K Rilstone                | Zephyr Special / Ford 2.3L                               |     33 | nan        |
| Ret   | 19        | Doug Whiteford   | Bill Patterson Motors P/L | Cooper T51 / Coventry Climax FPF 2.5L                    |     30 | Engine     |
| Ret   | [MISSING] | John Ampt        | J Ampt                    | Cooper T38 / Jaguar 3.8L                                 |     25 | nan        |
| Ret   | 30        | John Newmarch    | J Bruggeman               | Ricardian / Holden 2.4L                                  |     14 | nan        |
| Ret   | 56        | Helene Bittner   | H Bittner                 | Vitesse / Ford 100E 1.2L                                 |      1 | Gearbox    |
| Ret   | 3         | Laurie Whitehead | L Whitehead               | Ausper T2 / Ford 1.0L                                    |      0 | nan        |
| DNS   | 2         | Stan Jones       | Stan Jones Motors Pty Ltd | Cooper T51 / Coventry Climax FPF 2.5L                    |    nan | Engine     |
| DNS   | 29        | Garrie Cooper    | Elfin Sports Cars         | Elfin Formula Junior / Ford 1.1L                         |    nan | Gearbox    |
| DNS   | 44        | Dud Dansie       | Bakewell Bridge Motors    | BBM rotary valve special / Holden - Dunstan Rotary Valve |    nan | nan        |



row_idx: 13
col_idx: 1
col_name: No.
label: 11