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

Example Input: Sentence: 'A young blond boy flying a yellow kite'. Count the number of nouns in this sentence.
Example Output: 2

Example Input: Sentence: 'A couple of boats traveling down a river'. Count the number of nouns in this sentence.
Example Output: 3

Example Input: Sentence: 'some men are riding motorcycles on a wet road'. Count the number of verbs in this sentence.
Example Output:
1