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

Example Input: Sentence: 'A couple of people of surf boards in the ocean'. Count the number of verbs in this sentence.
Example Output: 0

Example Input: Sentence: 'A little cat sits on a laptop keyboard'. Count the number of verbs in this sentence.
Example Output: 1

Example Input: Sentence: 'A young giraffe standing in an open field'. Count the number of verbs in this sentence.
Example Output:
1