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

Ex Input:
Sentence: 'A man riding a skateboard on a walkway surrounded by people'. Count the number of verbs in this sentence.

Ex Output:
2


Ex Input:
Sentence: 'A modern bus parked at a station on the side of the road'. Count the number of verbs in this sentence.

Ex Output:
1


Ex Input:
Sentence: 'An old gentleman standing in a field with sheep'. Count the number of verbs in this sentence.

Ex Output:

1