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: roof is part of construction

Answer: roof PartOf construction


Question: sleep can be used as the opposite of awaken

Answer: sleep Antonym awaken


Question: mark can be used as the opposite of clean

Answer:
mark Antonym clean