Creature is related to Dog. Dog is related to Attack. Attack is related to Hit. Hit is related to Stroke. 
Difficulty is related to Danger. Danger is related to Panic. Panic can cause/lead to Injury. 
Creature <--RelatedTo--> Dog <--RelatedTo--> Attack <--RelatedTo--> Hit <--RelatedTo--> Stroke 
Difficulty <--RelatedTo--> Danger <--RelatedTo--> Panic --Causes--> Injury 