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

Example Input: Sentence: 'a sub sandwich wrapped in some paper and cut in half'. Count the number of nouns in this sentence.
Example Output: 4

Example Input: Sentence: 'A man and a woman walking towards a food vendor that is across the street'. Count the number of verbs in this sentence.
Example Output: 2

Example Input: Sentence: 'A keyboard that is sitting next to a mouse'. Count the number of nouns in this sentence.
Example Output:
2