Show the name and prominence of the mountains whose picture is not taken by a lens of brand 'Sigma'.
SELECT name ,  prominence FROM mountain EXCEPT SELECT T1.name ,  T1.prominence FROM mountain AS T1 JOIN photos AS T2 ON T1.id  =  T2.mountain_id JOIN camera_lens AS T3 ON T2.camera_lens_id  =  T3.id WHERE T3.brand  =  'Sigma'
SELECT name ,  prominence FROM mountain EXCEPT SELECT T1.name ,  T1.prominence FROM mountain AS T1 JOIN photos AS T2 ON T1.id  =  T2.mountain_id JOIN camera_lens AS T3 ON T2.camera_lens_id  =  T3.id WHERE T3.brand  =  'Sigma'
[{'name': 'Aksouâl', 'Prominence': 450.0}, {'name': 'Bada', 'Prominence': 1605.0}, {'name': 'Chilalo', 'Prominence': 610.0}, {'name': 'Choqa / Choke / Birhan', 'Prominence': 2225.0}, {'name': 'Cimbia', 'Prominence': 590.0}, {'name': 'Dubbai', 'Prominence': 1540.0}, {'name': 'Guna', 'Prominence': 1510.0}, {'name': 'Hey / Hay', 'Prominence': 660.0}, {'name': 'Inatye', 'Prominence': 500.0}, {'name': 'Jbel Toubkal', 'Prominence': 3755.0}, {'name': "Jebel n'Tarourt / Tifnout / Iferouane", 'Prominence': 910.0}, {'name': 'Kaka / Kecha / Chiqe', 'Prominence': 1215.0}, {'name': 'Mount Cameroon', 'Prominence': 3931.0}, {'name': 'Mount Kinangop', 'Prominence': 530.0}, {'name': 'Muggia', 'Prominence': 500.0}, {'name': 'Muhavura', 'Prominence': 1530.0}, {'name': 'Oldoinyo Lesatima', 'Prominence': 2081.0}, {'name': 'Ouanoukrim', 'Prominence': 420.0}, {'name': 'Weshema / Wasema?', 'Prominence': 420.0}]