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

Example Input: Sentence: 'A group of zebra standing in a grass field'. Count the number of verbs in this sentence.
Example Output: 0

Example Input: Sentence: 'A picture of a cat looking at its reflection in the water'. Count the number of nouns in this sentence.
Example Output: 4

Example Input: Sentence: 'A couple of giraffe standing next to each other near  a fence'. Count the number of nouns in this sentence.
Example Output:
3