What are the names of photos taken with the lens brand 'Sigma' or 'Olympus'?
return photos ;return lens #1 are taken with  ;return #1 where #2 is  'Sigma ;return #1 where #2 is  'Olympus ;return #3 or  #4 ;return names of #5
['select', 'project', 'comparative', 'comparative', 'union', 'project']