Table:
text: 1986 San Marino Grand Prix
Classification
Classification
Driver Constructor_ Laps Time_Retired Grid
Alain Prost McLaren - TAG 60 1:32:28.408 4
Nelson Piquet Williams - Honda 60 + 7.645 2
Gerhard Berger Benetton - BMW 59 + 1 Lap 9
Stefan Johansson Ferrari 59 + 1 Lap 7
Keke Rosberg McLaren - TAG 58 Out of Fuel 6
Riccardo Patrese Brabham - BMW 58 Out of Fuel 16
Thierry Boutsen Arrows - BMW 58 + 2 Laps 12
Martin Brundle Tyrrell - Renault 58 + 2 Laps 13
Marc Surer Arrows - BMW 57 + 3 Laps 15
Michele Alboreto Ferrari 56 Turbo 5

Question: Which constructor of the 1986 San Marino Grand Prix has a 12 grid?