CREATE TABLE "grands_prix" (
  "round" real,
  "date" text,
  "grand_prix" text,
  "circuit" text,
  "moto_gp_winner" text,
  "moto2_winner" text,
  "125cc_winner" text,
  "report" text
);

Question: How many MotoGP winners were there when the circuit was Catalunya?
SQL: SELECT COUNT("moto_gp_winner") FROM "grands_prix" WHERE "circuit"='Catalunya';

Question: Who are all the Moto2 winners when the grand prix was Shell Advance Malaysian Grand Prix?
SQL: SELECT "moto2_winner" FROM "grands_prix" WHERE "grand_prix"='Shell Advance Malaysian Grand Prix';

Question: Who are all the motogp winners when the circuit was Catalunya?
SQL: SELECT "moto_gp_winner" FROM "grands_prix" WHERE "circuit"='Catalunya';