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

Example Input: Sentence: 'Several people in beach chars while two children fly a kite on the sea shore'. Count the number of verbs in this sentence.
Example Output: 1

Example Input: Sentence: 'a person is standing in skies in the snow'. Count the number of verbs in this sentence.
Example Output: 1

Example Input: Sentence: 'Two red trains traveling next to each other next to a lush green hillside'. Count the number of verbs in this sentence.
Example Output:
1