Experienced is the opposite of Green. Green is related to Liberty. Liberty is related to Death. Infection can cause/lead to Death. 
Horizon is a type of Line. Cord is a type of Line. 
Experienced <--Antonym--> Green <--RelatedTo--> Liberty <--RelatedTo--> Death <--Causes-- Infection 
Horizon --IsA--> Line <--IsA-- Cord 