Question: How many hours per week did David Shieber play? | Do you mean the total hours per week did David Shieber play? (He can play different sports) | Yes, total hours
SQL: SELECT sum ( hoursperweek )   FROM Sportsinfo AS T1 JOIN Student AS T2 ON T1.StuID   =   T2.StuID WHERE T2.Fname   =   "David" AND T2.Lname   =   "Shieber"