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

Ex Input:
Sentence: 'One person tossing a frisbee to another person in front of some trees'. Count the number of verbs in this sentence.

Ex Output:
1

Ex Input:
Sentence: 'Street signs with a cartoon policeman in Shanghai'. Count the number of verbs in this sentence.

Ex Output:
0

Ex Input:
Sentence: 'A German shepherd laying in front of a door'. Count the number of verbs in this sentence.

Ex Output:
1