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

Example Input: Sentence: 'a keyboard that has some lego men on  it'. Count the number of nouns in this sentence.
Example Output: 2

Example Input: Sentence: 'A cat sitting next to a pair of legs on the ground'. Count the number of nouns in this sentence.
Example Output: 4

Example Input: Sentence: 'A man holds a red frisbee in preparation of throwing it'. Count the number of nouns in this sentence.
Example Output:
3