Song is related to Perfect. Perfect is the opposite of Mistake. Mistake is related to Decision. Decision is a type of Judgment. 
Conference is a type of Discussion. Discussion is a synonym of Treatment. Organization is a type of Treatment. 
Song <--RelatedTo--> Perfect <--Antonym--> Mistake <--RelatedTo--> Decision --IsA--> Judgment 
Conference --IsA--> Discussion <--Synonym--> Treatment <--IsA-- Organization 