What are the drivers' last names who had 11 pit stops and participated in more than 5 race results?
SELECT T1.surname ,  T1.driverid FROM drivers AS T1 JOIN pitstops AS T2 ON T1.driverid   =   T2.driverid GROUP BY T1.driverid HAVING count ( * )    =   11 INTERSECT SELECT T1.surname ,  T1.driverid FROM drivers AS T1 JOIN results AS T2 ON T1.driverid   =   T2.driverid GROUP BY T1.driverid HAVING count ( * )   >  5
drivers' last names refers to surname in drivers table; 11 pit stops refers to COUNT(*) = 11 in pitstops; participated in more than 5 race results refers to COUNT(*) > 5 in results;