Instructions: In this task, you need to count the number of nouns/verbs in the given sentence.
Input: Sentence: 'a gray black and yellow bird an apple and red and yellow leaves'. Count the number of nouns in this sentence.
Output:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
3