SCHEMA:
CREATE TABLE table_name_60 (yards INTEGER, sack VARCHAR, asst VARCHAR, totaltk VARCHAR)
USER:
What is the total of yards when asst. is 19, totaltk is 60 and sack is more than 0?

QUERY:
SELECT SUM(yards) FROM table_name_60 WHERE asst = 19 AND totaltk = 60 AND sack > 0