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

Example Input: Sentence: 'A zebra standing in a field taking a break'. Count the number of verbs in this sentence.
Example Output: 2

Example Input: Sentence: 'A polar bear stands on a rock surface in a zoo'. Count the number of verbs in this sentence.
Example Output: 1

Example Input: Sentence: 'A lot of people standing on the steps of a huge building'. Count the number of verbs in this sentence.
Example Output:
1