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

Example Input: Sentence: 'A person holding a bottle while riding a skateboard'. Count the number of verbs in this sentence.
Example Output: 2

Example Input: Sentence: 'A collection of books and knick-knacks on shelves'. Count the number of nouns in this sentence.
Example Output: 5

Example Input: Sentence: 'Some players in action on the soccer field'. Count the number of nouns in this sentence.
Example Output:
4