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'