Given a phrase describing the relationship between two words, extract the words and the lexical relationship between them. The relation has to be of the type 'MemberOf', 'MadeOf', 'Synonym', 'Entails', 'HasA', 'HasProperty', 'PartOf', 'Antonym' or 'IsA'. The output should have the format: word1 relation word2.
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Question: mind can be used as the opposite of matter

Answer: mind Antonym matter


Question: class can be used as the opposite of recess

Answer: class Antonym recess


Question: gun can be used as the opposite of knife

Answer:
gun Antonym knife