Personality is the opposite of Famous. Famous is related to Teen. Teenage is etymologically related to Teen. 
Obligation is related to Law. Law is related to Legislature. House is a type of Legislature. 
Personality <--Antonym--> Famous <--RelatedTo--> Teen <--EtymologicallyRelatedTo-- Teenage 
Obligation <--RelatedTo--> Law <--RelatedTo--> Legislature <--IsA-- House 