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

Example Input: Sentence: 'Two people on a motorcycle with another motorcycle in background'. Count the number of nouns in this sentence.
Example Output: 4

Example Input: Sentence: 'A teddy bear sitting on top of a metal bench'. Count the number of verbs in this sentence.
Example Output: 1

Example Input: Sentence: 'a gray black and yellow bird an apple and red and yellow leaves'. Count the number of nouns in this sentence.
Example Output:
3