Who was the opponent when Richmond played as the home team?
CREATE TABLE table_name_56 (away_team VARCHAR, home_team VARCHAR)
SELECT away_team FROM table_name_56 WHERE home_team = "richmond"
### Context: CREATE TABLE table_name_56 (away_team VARCHAR, home_team VARCHAR) ### Question: Who was the opponent when Richmond played as the home team? ### Answer: SELECT away_team FROM table_name_56 WHERE home_team = "richmond"