Possess is related to Mine. Mine is related to Metal. Metal is related to Bar. 
Valid is similar to Legitimate. Legitimate is the opposite of False. Pretend requires False. Pretend requires Act. 
Possess <--RelatedTo--> Mine <--RelatedTo--> Metal <--RelatedTo--> Bar 
Valid <--SimilarTo--> Legitimate <--Antonym--> False <--HasPrerequisite-- Pretend --HasPrerequisite--> Act 