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

Example Input: Sentence: 'a counter that has silverware and glasses on top of it'. Count the number of verbs in this sentence.
Example Output: 1

Example Input: Sentence: 'A cat that is laying down on a bed'. Count the number of verbs in this sentence.
Example Output: 1

Example Input: Sentence: 'A boy skateboards down a flight of stairs'. Count the number of verbs in this sentence.
Example Output:
1