What is the average capacity of the stadiums that were opened in year 2005?
CREATE TABLE stadium (capacity INTEGER, opening_year VARCHAR)
SELECT AVG(capacity) FROM stadium WHERE opening_year = 2005
### Context: CREATE TABLE stadium (capacity INTEGER, opening_year VARCHAR) ### Question: What is the average capacity of the stadiums that were opened in year 2005? ### Answer: SELECT AVG(capacity) FROM stadium WHERE opening_year = 2005