CREATE TABLE participates_in (stuid DECIMAL, actid DECIMAL)
CREATE TABLE student (stuid DECIMAL, lname TEXT, fname TEXT, age DECIMAL, sex TEXT, major DECIMAL, advisor DECIMAL, city_code TEXT)
CREATE TABLE activity (actid DECIMAL, activity_name TEXT)
CREATE TABLE faculty (facid DECIMAL, lname TEXT, fname TEXT, rank TEXT, sex TEXT, phone DECIMAL, room TEXT, building TEXT)
CREATE TABLE faculty_participates_in (facid DECIMAL, actid DECIMAL)

Find the first names of the faculty members who participate in Canoeing and Kayaking.
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'
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" AND "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" AND "T3"."activity_name" = 'Kayaking'