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

Example Input: Sentence: 'a small stuffed bear is sitting in a field'. Count the number of nouns in this sentence.
Example Output: 2

Example Input: Sentence: 'The bench seat by the window is empty'. Count the number of verbs in this sentence.
Example Output: 0

Example Input: Sentence: 'A little cat sits on a laptop keyboard'. Count the number of verbs in this sentence.
Example Output:
1