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

Ex Input:
Sentence: 'A picture of a dog staring down a fire hydrant'. Count the number of verbs in this sentence.

Ex Output:
1


Ex Input:
Sentence: 'A person holding a bottle while riding a skateboard'. Count the number of verbs in this sentence.

Ex Output:
2


Ex Input:
Sentence: 'A green slope is full of canoes up on the grass'. Count the number of verbs in this sentence.

Ex Output:

0