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

Example Input: Sentence: 'A man and a woman walking towards a food vendor that is across the street'. Count the number of verbs in this sentence.
Example Output: 2

Example Input: Sentence: 'A giraffe standing next to a stone wall'. Count the number of nouns in this sentence.
Example Output: 3

Example Input: Sentence: 'A double decker bus passes a fellow motorist on the street'. Count the number of nouns in this sentence.
Example Output:
5