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

Example Input: Sentence: 'A variety of shots of a man doing skateboarding tricks'. Count the number of verbs in this sentence.
Example Output: 1

Example Input: Sentence: 'A red jet plane streaming blue exhaust against a gray sky'. Count the number of verbs in this sentence.
Example Output: 0

Example Input: Sentence: 'A man is walking on the sidewalk holding an umbrella'. Count the number of nouns in this sentence.
Example Output:
3