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

Example Input: Sentence: 'A person is lying on the luggage claim conveyor belt'. Count the number of verbs in this sentence.
Example Output: 1

Example Input: Sentence: 'a small girl in a white shirt  sitting on a elephant statue'. Count the number of nouns in this sentence.
Example Output: 4

Example Input: Sentence: 'a man showing off his cell phone to someone sitting next to him'. Count the number of verbs in this sentence.
Example Output:
2