Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Driver | Constructor | Laps | Time/Retired | Grid |
| --- | --- | --- | --- | --- |
| Alain Prost | McLaren - TAG | 65.0 | 1:18:10.436 | 3.0 |
| Michele Alboreto | Ferrari | 64.0 | + 1 Lap | 6.0 |
| Jacques Laffite | Ligier - Renault | 64.0 | + 1 Lap | 16.0 |
| Nelson Piquet | Brabham - BMW | 64.0 | + 1 Lap | 2.0 |
| Derek Warwick | Renault | 64.0 | + 1 Lap | 12.0 |
| Marc Surer | Brabham - BMW | 63.0 | + 2 Laps | 15.0 |
| Martin Brundle | Tyrrell - Renault | 63.0 | + 2 Laps | 20.0 |
| Gerhard Berger | Arrows - BMW | 63.0 | + 2 Laps | 17.0 |
| Riccardo Patrese | Alfa Romeo | 62.0 | + 3 Laps | 14.0 |
| Ayrton Senna | Lotus - Renault | 60.0 | Fuel injection, electronics | 4.0 |
| Stefan Bellof | Tyrrell - Ford | 59.0 | + 6 Laps | 26.0 |
| Niki Lauda | McLaren - TAG | 57.0 | Electrical | 10.0 |
| Thierry Boutsen | Arrows - BMW | 57.0 | Spun Off | 19.0 |
| Andrea de Cesaris | Ligier - Renault | 41.0 | Clutch | 7.0 |
| Pierluigi Martini | Minardi - Motori Moderni | 38.0 | Transmission | 23.0 |
| Elio de Angelis | Lotus - Renault | 37.0 | Not Classified | 8.0 |
| Manfred Winkelhock | RAM - Hart | 28.0 | Turbo | 18.0 |
| Keke Rosberg | Williams - Honda | 21.0 | Exhaust | 1.0 |
| Nigel Mansell | Williams - Honda | 17.0 | Clutch | 5.0 |
| Eddie Cheever | Alfa Romeo | 17.0 | Turbo | 22.0 |
| Jonathan Palmer | Zakspeed | 6.0 | Engine | 24.0 |
| Teo Fabi | Toleman - Hart | 4.0 | Transmission | 9.0 |
| Stefan Johansson | Ferrari | 1.0 | Accident | 11.0 |
| Patrick Tambay | Renault | 0.0 | Collision | 13.0 |
| Philippe Alliot | RAM - Hart | 0.0 | Accident | 21.0 |
| Piercarlo Ghinzani | Osella - Alfa Romeo | 0.0 | Accident | 25.0 |
Question:
Which driver drove in grid 19?
Answer:
Thierry Boutsen