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: heavy can be used as the opposite of lightweight

Answer: heavy Antonym lightweight


Question: sleep is a kind of relax

Answer: sleep IsA relax


Question: help is a kind of serve

Answer:
help IsA serve