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

Ex Input:
Sentence: 'The players are playing a game of Frisbee on the grass'. Count the number of verbs in this sentence.

Ex Output:
1


Ex Input:
Sentence: 'a young teen boy doing a trick on his skateboard'. Count the number of verbs in this sentence.

Ex Output:
1


Ex Input:
Sentence: 'Two zebras hang out by the fence in the zoo'. Count the number of nouns in this sentence.

Ex Output:

3