In this task, you need to count the number of nouns/verbs in the given sentence.

Example Input: Sentence: 'A tall clock tower flanked by two trees'. Count the number of nouns in this sentence.
Example Output: 3

Example Input: Sentence: 'A picture of a picture of a man wearing a tie'. Count the number of nouns in this sentence.
Example Output: 4

Example Input: Sentence: 'A bench next to a wall with a staircase behind it'. Count the number of nouns in this sentence.
Example Output:
3