user: ### NOW ANSWER:
Question: Which Year has a Competition of Olympic Games, and a Venue of Atlanta, United States?
Columns: ['Year', 'Competition', 'Venue', 'Position', 'Event', 'Notes']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1986.0, 'Venice Marathon', 'Venice, Italy', '1st', 'Marathon', '2:18:44']
SQL:

assistant: SELECT AVG("Year") FROM "Table" WHERE "Competition" = 'Olympic Games' AND "Venue" = 'Atlanta, United States';