user: Question: What is the smallest point amount for years prior to 1958 when the class is 350cc?
Columns: ['Year', 'Class', 'Team', 'Points', 'Wins']
Types: ['real', 'text', 'text', 'real', 'real']
Sample row: [1954.0, '350cc', 'Norton', 0.0, 0.0]
SQL:

assistant: SELECT MIN("Points") FROM "Table" WHERE "Year" < 1958.0 AND "Class" = '350cc';