user: Question: What is darrius heyward-bey's average with more than 20 yards and less than 80 long?
Columns: ['Player', 'Rec.', 'Yards', 'Avg.', 'Long']
Types: ['text', 'real', 'real', 'real', 'real']
Sample row: ['Darrius Heyward-Bey', 42.0, 609.0, 14.5, 80.0]
SQL:

assistant: SELECT "Avg." FROM "Table" WHERE "Yards" > 20.0 AND "Player" = 'darrius heyward-bey' AND "Long" < 80.0;