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

Example Input: Sentence: 'There is a silver and blue fire hydrant on a grass field'. Count the number of nouns in this sentence.
Example Output: 5

Example Input: Sentence: 'Two Astros fans use their cell phones in the stands'. Count the number of verbs in this sentence.
Example Output: 1

Example Input: Sentence: 'A cow standing in the middle of a field'. Count the number of nouns in this sentence.
Example Output:
3