user: Question: What is the start of Offy engine and in 1972?
Columns: ['Year', 'Chassis', 'Engine', 'Start', 'Finish', 'Entrant']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1969.0, 'Lola', 'Offy', '4th', '7th', 'Penske']
SQL:

assistant: SELECT "Start" FROM "Table" WHERE "Engine" = 'Offy' AND "Year" = 1972.0;