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: 'The angle view of tower with a clock'. Count the number of nouns in this sentence.
Example Output: 4

Example Input: Sentence: 'Two dogs around a flower pot looking at something'. Count the number of verbs in this sentence.
Example Output:
1