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

Input: Consider Input: Sentence: 'Elephants in a national park blowing dust around'. Count the number of nouns in this sentence.

Output: 3

Input: Consider Input: Sentence: 'Two people shaving letters on the side of a goat'. Count the number of nouns in this sentence.

Output: 4

Input: Consider Input: Sentence: 'Black dog in a mowed field returning a frisbee to the thrower'. Count the number of nouns in this sentence.
Output: 4