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

Example Input: Sentence: 'A group of men leaning over rail as a dog approaches them'. Count the number of verbs in this sentence.
Example Output: 2

Example Input: Sentence: 'A person on a field swinging a tennis racket'. Count the number of verbs in this sentence.
Example Output: 1

Example Input: Sentence: 'A bus sitting on the street next to a car'. Count the number of nouns in this sentence.
Example Output:
3