Tree is related to Green. Green is related to Party. Party is related to Friend. Friend is a different concept from Girlfriend. 
Sugar is related to Crystal. Diamond is a type of Crystal. Diamond is related to Brilliant. 
Tree <--RelatedTo--> Green <--RelatedTo--> Party <--RelatedTo--> Friend <--DistinctFrom--> Girlfriend 
Sugar <--RelatedTo--> Crystal <--IsA-- Diamond <--RelatedTo--> Brilliant 