Question: Find the first names of the faculty members who participate in Caonoeing and Kayaking.
SQL: SELECT T1.lname FROM Faculty AS T1 JOIN Faculty_participates_in AS T2 ON T1.facID   =   T2.facID JOIN activity AS T3 ON T2.actid   =   T2.actid WHERE T3.activity_name   =   'Canoeing' INTERSECT SELECT T1.lname FROM Faculty AS T1 JOIN Faculty_participates_in AS T2 ON T1.facID   =   T2.facID JOIN activity AS T3 ON T2.actid   =   T2.actid WHERE T3.activity_name   =   'Kayaking'