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

Ex Input:
Sentence: 'A person smiles as she stands on a skateboard in a crowd with a photographer nearby'. Count the number of verbs in this sentence.

Ex Output:
2

Ex Input:
Sentence: 'The busy street is crowded with people near tall buildings'. Count the number of nouns in this sentence.

Ex Output:
3

Ex Input:
Sentence: 'A man riding on the back of a gray elephant'. Count the number of nouns in this sentence.

Ex Output:
3