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

### Instruction:
How many yards were averaged by the player that had a higher than 13 average with less than 18 long?

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

### Response:
SELECT AVG Yards FROM table WHERE Long < 18 AND Avg. > 13