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

Example Input: Sentence: 'A young boy takes a swing during a little league baseball game'. Count the number of verbs in this sentence.
Example Output: 1

Example Input: Sentence: 'Elephants in a national park blowing dust around'. Count the number of nouns in this sentence.
Example Output: 3

Example Input: Sentence: 'A man is using a cell phone to photograph a barn'. Count the number of verbs in this sentence.
Example Output:
2