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

Ex Input:
Sentence: 'A backyard with tables, shade trees, and a stepping stone path'. Count the number of verbs in this sentence.

Ex Output:
1


Ex Input:
Sentence: 'A red jet plane streaming blue exhaust against a gray sky'. Count the number of verbs in this sentence.

Ex Output:
0


Ex Input:
Sentence: 'Two buses are going in opposite directions on a city street'. Count the number of verbs in this sentence.

Ex Output:

1