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

Ex Input:
Sentence: 'A black and white image of a park bench'. Count the number of verbs in this sentence.

Ex Output:
0


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 man is riding on a surfboard on the water'. Count the number of verbs in this sentence.

Ex Output:

1