Table: grand_prix_results_2
Columns: round
date
grand_prix
circuit
125cc_winner
250cc_winner
motogp_winner
report

Question: Who won the spanish grand prix?
SQL: SELECT "250cc_winner" FROM grand_prix_results_2 WHERE "grand_prix" = 'Spanish Grand Prix'

Question: What is the date for the Indianapolis circuit?
SQL: SELECT "date" FROM grand_prix_results_2 WHERE "circuit" = 'Indianapolis'

Question: in round 9 who was the 250cc winner?
SQL: SELECT "250cc_winner" FROM grand_prix_results_2 WHERE "round" = 9