user: Question: Name the least year for Gene Hassell manager and 6th finish
Columns: ['Year', 'Record', 'Finish', 'Manager', 'Playoffs']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1974.0, '31-39', '7th', 'Hoyt Wilhelm', 'none']
SQL:

assistant: SELECT MIN("Year") FROM "Table" WHERE "Manager" = 'Gene Hassell' AND "Finish" = '6th';