Question: Name the report with 125cc winner of Simone Corsi and circuit of Valencia
SQL: SELECT "Report" FROM "2-12186237-1" WHERE "125cc winner" = 'Simone Corsi' AND "Circuit" = 'Valencia';

Question: Name the motogp winner with 125cc winner of Gábor Talmácsi and round of 13
SQL: SELECT "MotoGP winner" FROM "2-12186237-1" WHERE "125cc winner" = 'Gábor Talmácsi' AND "Round" = 13.0;

Question: Name the 125cc winner with circuit of Estoril
SQL: SELECT "125cc winner" FROM "2-12186237-1" WHERE "Circuit" = 'Estoril';

Question: Name the date for motogp winner of Casey Stoner and grand prix of Valencian Grand Prix
SQL: SELECT "Date" FROM "2-12186237-1" WHERE "MotoGP winner" = 'Casey Stoner' AND "Grand Prix" = 'Valencian Grand Prix';

Question: Name the circuit for round 18
SQL: SELECT "Circuit" FROM "2-12186237-1" WHERE "Round" = 18.0;

Question: Name the grand prix for Casey Stoner and circuit of Losail
SQL: SELECT "Grand Prix" FROM "2-12186237-1" WHERE "MotoGP winner" = 'Casey Stoner' AND "Circuit" = 'Losail';