Task: Question Answering
Input (English): passage: Adjectival noun is a term that was formerly synonymous with noun adjunct but is now usually used to mean ``an adjective used as a noun'' (i.e. the opposite process, as in the Irish meaning ``Irish people'' or the poor meaning ``poor people''). Japanese adjectival nouns are a different concept.
 question: can you use an adjective as a noun?
Output (English): Yes