Informal is a different concept from Dress. Dress is the opposite of Long. Long is the opposite of Instant. 
District is related to Segment. Segment is related to Episode. Episode is related to Show. 
Informal <--DistinctFrom--> Dress <--Antonym--> Long <--Antonym--> Instant 
District <--RelatedTo--> Segment <--RelatedTo--> Episode <--RelatedTo--> Show 