Question: Perfect, how many drivers had 11 pit stops and participated in more than 5 total races?
SQL: select count ( * )  from  ( 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 )