user: Question: What is the average grid with BRM and under 63 laps?
Columns: ['Driver', 'Constructor', 'Laps', 'Time/Retired', 'Grid']
Types: ['text', 'text', 'real', 'text', 'real']
Sample row: ['Jackie Stewart', 'Tyrrell - Ford', 70.0, '1:42:13.43', 6.0]
SQL:

assistant: SELECT AVG("Grid") FROM "Table" WHERE "Constructor" = 'BRM' AND "Laps" < 63.0;