user: Question: Name the least 4 car sets
Columns: ['Fiscal year', '2-car sets', '3-car sets', '4-car sets', '6-car sets', '8-car sets', 'Total vehicles']
Types: ['real', 'real', 'real', 'real', 'real', 'real', 'real']
Sample row: [2005.0, 70.0, 10.0, 40.0, 46.0, 12.0, 702.0]
SQL:

assistant: SELECT MIN("4-car sets") FROM "Table";