Regret is related to Like. Like is related to Rate. Rate is related to Percentage. 
Kill is related to Bloody. Bloody is related to War. War is related to Armed. 
Regret <--RelatedTo--> Like <--RelatedTo--> Rate <--RelatedTo--> Percentage 
Kill <--RelatedTo--> Bloody <--RelatedTo--> War <--RelatedTo--> Armed 