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

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

Example Input: Sentence: 'Two boats are docked at the bank of a river'. Count the number of nouns in this sentence.
Example Output: 3

Example Input: Sentence: 'A train on a track in the middle of a neighborhood'. Count the number of nouns in this sentence.
Example Output:
4