CREATE TABLE faculty_participates_in (facid DECIMAL, actid DECIMAL)
CREATE TABLE participates_in (stuid DECIMAL, actid DECIMAL)
CREATE TABLE faculty (facid DECIMAL, lname TEXT, fname TEXT, rank TEXT, sex TEXT, phone DECIMAL, room TEXT, building TEXT)
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)

Find the first names of the faculty members who are playing Canoeing or Kayaking.
SELECT DISTINCT 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' OR T3.activity_name = 'Kayaking'
SELECT DISTINCT "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' OR "T3"."activity_name" = 'Kayaking')