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.

leaf can be used as the opposite of stem
leaf Antonym stem

head is part of screw
head PartOf screw

concentrate can be used as the opposite of distribute

concentrate Antonym distribute