user: Question: What is the lowest Prize amount for the Irish Derby Race?
Columns: ['Race', 'Dist (f)', 'Course', 'Class', 'Prize (£K)', 'Odds', 'Runners', 'Placing', 'Margin', 'Time', 'Jockey', 'Trainer']
Types: ['text', 'real', 'text', 'text', 'real', 'text', 'real', 'real', 'text', 'text', 'text', 'text']
Sample row: ['Dance Design EBF Maiden', 8.0, 'Curragh', 'M', 4.0, 'Evens', 13.0, 1.0, '1.5', '1:41.80', 'Johnny Murtagh', 'John Oxx']
SQL:

assistant: SELECT MIN("Prize (£K)") FROM "Table" WHERE "Race" = 'Irish Derby';