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

Example Input: Sentence: 'a young teen boy doing a trick on his skateboard'. Count the number of verbs in this sentence.
Example Output: 1

Example Input: Sentence: 'A young girl in her Tennis gear is holding the ball'. Count the number of nouns in this sentence.
Example Output: 3

Example Input: Sentence: 'A man smiling as he holds two ties while a lady sits nearby'. Count the number of nouns in this sentence.
Example Output:
3