CREATE TABLE "round_11" (
  "home_team" text,
  "home_team_score" text,
  "away_team" text,
  "away_team_score" text,
  "venue" text,
  "crowd" real,
  "date" text
);

Question: What's the crowd population of the home team located in Richmond?
SQL: SELECT SUM("crowd") FROM "round_11" WHERE "home_team"='richmond';

Question: What is the visiting team that has a home team related to footscray?
SQL: SELECT "away_team" FROM "round_11" WHERE "home_team"='footscray';