What are the first names of the professors who do not play Canoeing or Kayaking as activities?
return professors ;return activities of  #1 ;return #1 where #2 is  not  Canoeing ;return #1 where #2 is  not  Kayaking ;return #1 of  both #3 and  #4 ;return first names of  #5
['select', 'project', 'comparative', 'comparative', 'intersection', 'project']