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

Example Input: Sentence: 'A trailer cart filled up high with travel luggage'. Count the number of nouns in this sentence.
Example Output: 4

Example Input: Sentence: 'A boy in a wheel chair on a tennis court'. Count the number of nouns in this sentence.
Example Output: 5

Example Input: Sentence: 'A man riding a skateboard down the side of a handrail'. Count the number of nouns in this sentence.
Example Output:
4