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

Example Input: Sentence: 'a snowboarder showing off on his snowboard in the air'. Count the number of nouns in this sentence.
Example Output: 3

Example Input: Sentence: 'Old man in a white outfit swinging at a tennis ball with a racket'. Count the number of nouns in this sentence.
Example Output: 5

Example Input: Sentence: 'A jumbo jet flies through the air on a sunny day'. Count the number of nouns in this sentence.
Example Output:
3