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

Example Input: Sentence: 'A baseball player attempting to slide into a base'. Count the number of verbs in this sentence.
Example Output: 2

Example Input: Sentence: 'an elephant standing in some tall grass next to the bushes'. Count the number of verbs in this sentence.
Example Output: 1

Example Input: Sentence: 'A bench sitting on a beach side next to a fence'. Count the number of verbs in this sentence.
Example Output:
1