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

Example Input: Sentence: 'A spray paint covered fire hydrant on a side walk'. Count the number of verbs in this sentence.
Example Output: 1

Example Input: Sentence: 'A plate of food and a glass of liquid'. Count the number of verbs in this sentence.
Example Output: 0

Example Input: Sentence: 'Three men are riding a spotted elephant in the middle of the park'. Count the number of verbs in this sentence.
Example Output:
2