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.

keep can be used with the same meaning of protect
keep Synonym protect

Head is a kind of object
head IsA object

bad can be used as the opposite of good

bad Antonym good