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

Question: Who is the Motogp winnder for the Catalunya Circuit?
SQL: SELECT "motogp_winner" FROM grand_prix_results WHERE "circuit" = 'Catalunya'

Question: Who is the 125cc winnder for the Phillip Island circuit?
SQL: SELECT "125cc_winner" FROM grand_prix_results WHERE "circuit" = 'Phillip Island'

Question: What is the date of the German Grand Prix?
SQL: SELECT "date" FROM grand_prix_results WHERE "grand_prix" = 'German Grand Prix'

Question: What circuit was on the date 4 May?
SQL: SELECT "circuit" FROM grand_prix_results WHERE "date" = '4 May'