user: Question: Name the least points where 1989-90 is 31
Columns: ['Team', 'Average', 'Points', 'Played', '1989-90', '1990-91', '1991-1992']
Types: ['text', 'text', 'real', 'real', 'text', 'text', 'real']
Sample row: ['River Plate', '1.342', 153.0, 114.0, '53', '45', 55.0]
SQL:

assistant: SELECT MIN("Points") FROM "Table" WHERE "1989-90" = '31';