Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_19517448_3 (yards_per_attempt VARCHAR, total_yards VARCHAR)
### Question:
How many yards per attempt were there when total yards were 513?
### Answer:
SELECT yards_per_attempt FROM table_19517448_3 WHERE total_yards = "513"