user: Question: Tell me the constructor for grid of 8
Columns: ['Driver', 'Constructor', 'Laps', 'Time/Retired', 'Grid']
Types: ['text', 'text', 'real', 'text', 'real']
Sample row: ['David Coulthard', 'McLaren - Mercedes', 58.0, '1:30:28.718', 4.0]
SQL:

assistant: SELECT "Constructor" FROM "Table" WHERE "Grid" = 8.0;