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.

separation can be used as the opposite of keep
separation Antonym keep

i can be used as the opposite of you
i Antonym you

deceive is a kind of pretend

deceive IsA pretend