user: ### NOW ANSWER:
Question: Name the Wins which has a Class of 350cc, and a Year smaller than 1973?
Columns: ['Year', 'Class', 'Team', 'Points', 'Wins']
Types: ['real', 'text', 'text', 'real', 'real']
Sample row: [1970.0, '250cc', 'Yamaha', 0.0, 0.0]
SQL:

assistant: SELECT SUM("Wins") FROM "Table" WHERE "Class" = '350cc' AND "Year" < 1973.0;