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

Which faculty members are playing either Canoeing or Kayaking? Tell me their first names.
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" "T1" JOIN "faculty_participates_in" "T2" ON "T1"."facid" = "T2"."facid" JOIN "activity" "T3" ON "T2"."actid" = "T2"."actid" AND ("T3"."activity_name" = 'Canoeing' OR "T3"."activity_name" = 'Kayaking')