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: concrete can be characterized by hard

Answer: concrete HasProperty hard


Question: atmosphere is part of sky

Answer: atmosphere PartOf sky


Question: General can be used as the opposite of unique

Answer:
general Antonym unique