CREATE TABLE "round_19" (
  "home_team" text,
  "home_team_score" text,
  "away_team" text,
  "away_team_score" text,
  "venue" text,
  "crowd" real,
  "date" text
);

Question: In the match where geelong was the away team, who was the home team?
SQL: SELECT "home_team" FROM "round_19" WHERE "away_team"='geelong';