user: Question: What is the low rebound total for players from oklahoma before 1975?
Columns: ['Player', 'Pos.', 'From', 'School/Country', 'Rebs', 'Asts']
Types: ['text', 'text', 'real', 'text', 'real', 'real']
Sample row: ['Alvan Adams Category:Articles with hCards', 'C/F', 1975.0, 'Oklahoma', 6937.0, 4012.0]
SQL:

assistant: SELECT MIN("Rebs") FROM "Table" WHERE "School/Country" = 'oklahoma' AND "From" < 1975.0;