Show the name and prominence of the mountains whose picture is not taken by a lens of brand 'Sigma'.
return mountains ;return pictures of #1 ;return lenses of #2 ;return brands of #3 ;return #1 where #4 is  not 'Sigma ;return names of #5 ;return prominences of #5 ;return #6 ,  #7
['select', 'project', 'project', 'project', 'comparative', 'project', 'project', 'union']