Question: Who won the Spanish Grand Prix?
SQL: SELECT "250cc winner" FROM "1-15299235-1" WHERE "Grand Prix" = 'Spanish Grand Prix';

Question: What is the date for the Indianapolis circuit?
SQL: SELECT "Date" FROM "1-15299235-1" WHERE "Circuit" = 'Indianapolis';

Question: in round 9 who was the 250cc winner?
SQL: SELECT "250cc winner" FROM "1-15299235-1" WHERE "Round" = 9.0;