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

Ex Input:
Sentence: 'This is a black and white photo of a train sitting on the tracks'. Count the number of verbs in this sentence.

Ex Output:
1


Ex Input:
Sentence: 'A parking meter in front of a car'. Count the number of nouns in this sentence.

Ex Output:
4


Ex Input:
Sentence: 'a couple of people are crossing a street'. Count the number of verbs in this sentence.

Ex Output:

1