The conversation between human and AI assistant.
[|Human|] Find the percentage of the sentence that is made up of nouns.
[|AI|] Approximately 27% (4 out of 15) of the words in the sentence are nouns. These nouns are "family," "fun," "park," and "rollercoaster."
[|Human|] 
Find the percentage of the sentence that is made up of nouns.