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.

sign can be used with the same meaning of mark
sign Synonym mark

library is a kind of room
library IsA room

joint is a kind of body_part

joint IsA body_part