Back is a type of Switch. Back is the opposite of Reach. Reach is related to Extent. 
you are likely to find Garbage in/at/on Television. you are likely to find Cartoon in/at/on Television. Cartoon is a type of Drawing. Drawing is related to Trace. 
Switch <--IsA-- Back <--Antonym--> Reach <--RelatedTo--> Extent 
Garbage --AtLocation--> Television <--AtLocation-- Cartoon --IsA--> Drawing <--RelatedTo--> Trace 