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

Example Input: Sentence: 'a big white airplane that is on a runway'. Count the number of verbs in this sentence.
Example Output: 1

Example Input: Sentence: 'Two young girls sitting on top of a bench'. Count the number of nouns in this sentence.
Example Output: 3

Example Input: Sentence: 'A house has a small staircase and a disconnected refrigerator'. Count the number of nouns in this sentence.
Example Output:
3