CREATE TABLE "winners" (
  "year" real,
  "dates" text,
  "champion" text,
  "country" text,
  "score" real,
  "to_par" text,
  "margin_of_victory" text,
  "tournament_location" text,
  "purse_us" real,
  "winners_share" text
);

Question: Name the dates for margin of victory being 5 strokes
SQL: SELECT COUNT("dates") FROM "winners" WHERE "margin_of_victory"='5 strokes';

Question: Name the champion for  london hunt and country club ( london , on )
SQL: SELECT "champion" FROM "winners" WHERE "tournament_location"='London Hunt and Country Club ( London , ON )';