Horizon is a type of Single. Would is a type of Single. Would is related to Have. 
Dangerous is related to Bomb. Bomb is related to Terrorist. Terrorist is a type of Radical. 
Horizon --IsA--> Single <--IsA-- Would <--RelatedTo--> Have 
Dangerous <--RelatedTo--> Bomb <--RelatedTo--> Terrorist --IsA--> Radical 