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

Ex Input:
Sentence: 'A brown cow walks on a road with two motor bikes in the background'. Count the number of verbs in this sentence.

Ex Output:
1

Ex Input:
Sentence: 'A sandwich with lettuce and tomatoes sits on a box in a park'. Count the number of nouns in this sentence.

Ex Output:
5

Ex Input:
Sentence: 'a street sign saying there is no parking at night'. Count the number of verbs in this sentence.

Ex Output:
1