Question: What is the number of pole position with a round of 15?
SQL: SELECT COUNT("Pole Position") FROM "1-1137707-2" WHERE "Round" = 15.0;

Question: What is the date of the Circuit Gilles Villeneuve?
SQL: SELECT "Date" FROM "1-1137707-2" WHERE "Location" = 'Circuit Gilles Villeneuve';

Question: What is the location of Thierry Boutsen?
SQL: SELECT "Location" FROM "1-1137707-2" WHERE "Fastest Lap" = 'Thierry Boutsen';