CREATE TABLE "round_4" (
  "home_team" text,
  "home_team_score" text,
  "away_team" text,
  "away_team_score" text,
  "venue" text,
  "crowd" real,
  "date" text
);

Question: How large was the crowd at Glenferrie Oval?
SQL: SELECT SUM("crowd") FROM "round_4" WHERE "venue"='glenferrie oval';