user
Instruction
Answer the question based on the provided table.


Table
Table Title: 1990 British Grand Prix
Table Content:
| Pos | No | Driver | Constructor | Laps | Time/Retired | Grid | Points |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | 1 | Alain Prost | Ferrari | 64 | 1:18:30.999 | 5 | 9 |
| 2 | 5 | Thierry Boutsen | Williams-Renault | 64 | + 39.092 | 4 | 6 |
| 3 | 27 | Ayrton Senna | McLaren-Honda | 64 | + 43.088 | 2 | 4 |
| 4 | 29 | Éric Bernard | Lola-Lamborghini | 64 | + 1:15.302 | 8 | 3 |
| 5 | 20 | Nelson Piquet | Benetton-Ford | 64 | + 1:24.003 | 11 | 2 |
| 6 | 30 | Aguri Suzuki | Lola-Lamborghini | 63 | + 1 Lap | 9 | 1 |
| 7 | 10 | Alex Caffi | Arrows-Ford | 63 | + 1 Lap | 17 |  |
| 8 | 4 | Jean Alesi | Tyrrell-Ford | 63 | + 1 Lap | 6 |  |
| 9 | 8 | Stefano Modena | Brabham-Judd | 62 | + 2 Laps | 20 |  |
| 10 | 25 | Nicola Larini | Ligier-Ford | 62 | + 2 Laps | 21 |  |
| 11 | 21 | Emanuele Pirro | Dallara-Ford | 62 | + 2 Laps | 19 |  |
| 12 | 24 | Paolo Barilla | Minardi-Ford | 62 | + 2 Laps | 24 |  |
| 13 | 26 | Philippe Alliot | Ligier-Ford | 61 | + 3 Laps | 22 |  |
| 14 | 28 | Gerhard Berger | McLaren-Honda | 60 | Throttle | 3 |  |
| Ret | 2 | Nigel Mansell | Ferrari | 55 | Gearbox | 1 |  |
| Ret | 16 | Ivan Capelli | Leyton House-Judd | 48 | Fuel Leak | 10 |  |
| Ret | 12 | Martin Donnelly | Lotus-Lamborghini | 48 | Engine | 14 |  |
| Ret | 11 | Derek Warwick | Lotus-Lamborghini | 46 | Engine | 16 |  |
| Ret | 17 | Gabriele Tarquini | AGS-Ford | 41 | Engine | 26 |  |
| Ret | 9 | Michele Alboreto | Arrows-Ford | 37 | Engine | 25 |  |
| Ret | 6 | Riccardo Patrese | Williams-Renault | 26 | Chassis | 7 |  |
| Ret | 3 | Satoru Nakajima | Tyrrell-Ford | 20 | Electrical | 12 |  |
| Ret | 19 | Alessandro Nannini | Benetton-Ford | 15 | Collision | 13 |  |
| Ret | 22 | Andrea de Cesaris | Dallara-Ford | 12 | Fuel System | 23 |  |
| Ret | 23 | Pierluigi Martini | Minardi-Ford | 3 | Alternator | 18 |  |
| DNS | 15 | Maurício Gugelmin | Leyton House-Judd | 0 | Fuel Pump | 15 |  |
| DNQ | 14 | Olivier Grouillard | Osella-Ford |  |  |  |  |
| DNQ | 7 | David Brabham | Brabham-Judd |  |  |  |  |
| DNQ | 36 | JJ Lehto | Onyx-Ford |  |  |  |  |
| DNQ | 35 | Gregor Foitek | Onyx-Ford |  |  |  |  |
| DNPQ | 33 | Roberto Moreno | EuroBrun-Judd |  |  |  |  |
| DNPQ | 18 | Yannick Dalmas | AGS-Ford |  |  |  |  |
| DNPQ | 34 | Claudio Langes | EuroBrun-Judd |  |  |  |  |
| DNPQ | 31 | Bertrand Gachot | Coloni-Subaru |  |  |  |  |
| DNPQ | 39 | Bruno Giacomelli | Life |  |  |  |  |


Question
how many laps did alain prost finished?


Answer Format
The final answer should be concise and use the following format:
```json
{
    "answer": [
        "answer1",
        "answer2",
        ...
    ]
}
```
rule
["64"]