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

Example Input: Sentence: 'A collection of headshots dot the picture frame'. Count the number of nouns in this sentence.
Example Output: 4

Example Input: Sentence: 'A person holding a bottle while riding a skateboard'. Count the number of verbs in this sentence.
Example Output: 2

Example Input: Sentence: 'a cat with its head in a small purse'. Count the number of verbs in this sentence.
Example Output:
0