มีกี่หลาต่อครั้งเมื่อรวมระยะได้ 513 หลา?ไม่จำเป็นต้องใช้โต๊ะทั้งหมด
How many yards per attempt were there when total yards were 513?It is not neccessary to use all the tables.
 table_19517448_3:  (yards_per_attempt [ VARCHAR ] total_yards [ VARCHAR) ]
SELECT yards_per_attempt FROM table_19517448_3 WHERE total_yards = "513"