Earthquake is related to Magnitude. Bulk is a type of Magnitude. Bulk is a synonym of Majority. Majority is the opposite of Minority. 
Adventure is related to Movie. Movie is related to Poster. 
Earthquake <--RelatedTo--> Magnitude <--IsA-- Bulk <--Synonym--> Majority <--Antonym--> Minority 
Adventure <--RelatedTo--> Movie <--RelatedTo--> Poster 