Query: How many students at Notre Dame received the Heisman Trophy?
Context: The university's athletic teams are members of the NCAA Division I and are known collectively as the Fighting Irish. The football team, an Independent, has accumulated eleven consensus national championships, seven Heisman Trophy winners, 62 members in the College Football Hall of Fame and 13 members in the Pro Football Hall of Fame and is considered one of the most famed and successful college football teams in history. Other ND teams, chiefly in the Atlantic Coast Conference, have accumulated 16 national championships.