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

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 zebra in the sun on a dirt road'. Count the number of nouns in this sentence.

Ex Output:
4

Ex Input:
Sentence: 'A man is sitting in front of a stuffed bear'. Count the number of nouns in this sentence.

Ex Output:
3