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 group of people walking beside a rail train'. Count the number of nouns in this sentence.
Example Output: 4

Example Input: Sentence: 'A kitchen with a slanted ceiling and skylight'. Count the number of verbs in this sentence.
Example Output:
0