user: Question: What is the tyres with a year earlier than 1961 for a Climax L4 engine?
Columns: ['Year', 'Chassis', 'Engine', 'Tyres', 'Points']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1957.0, 'Cooper T43', 'Climax L-4', 'D', 'n/a1']
SQL:

assistant: SELECT "Tyres" FROM "Table" WHERE "Year" < 1961.0 AND "Engine" = 'Climax L4';