In this task, you need to count the number of vowels (letters 'a', 'e', 'i', 'o', 'u') / consonants (all letters other than vowels) in the given sentence.
Sentence: 'the view shows a stunning skyline at one end, and in the foreground an ugly barricade, behind which stands a man looking up, his arm aloft, as if trying to get a shot of the skyline'. Count the number of vowels in the given sentence.