Bit is a synonym of Segment. Segment is related to Episode. Incident is part of Episode. Infection is a type of Incident. 
Character is related to Sign. Sign is related to Object. Object is related to Class. Class is related to Seminar. 
Bit <--Synonym--> Segment <--RelatedTo--> Episode <--PartOf-- Incident <--IsA-- Infection 
Character <--RelatedTo--> Sign <--RelatedTo--> Object <--RelatedTo--> Class <--RelatedTo--> Seminar 