Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What is Darrius Heyward-Bey's average with more than 20 yards and less than 80 long?

### Inputs:
table_name: table, columns: ['Player', 'Rec.', 'Yards', 'Avg.', 'Long']

### Response:
SELECT COUNT Avg. FROM table WHERE Yards > 20 AND Player = darrius heyward-bey AND Long < 80