Slight is the opposite of Important. Important is related to Apple. Apple is related to Trouble. Scandal is a type of Trouble. 
Required is related to Cost. Cost is related to Good. 
Slight <--Antonym--> Important <--RelatedTo--> Apple <--RelatedTo--> Trouble <--IsA-- Scandal 
Required <--RelatedTo--> Cost <--RelatedTo--> Good 