Safety is a type of Goal. Safety is related to Medicine. Medicine is related to Drug. Drug is related to Pot. 
Force is related to Armed. Armed is related to Duty. Duty is related to Army. 
Goal <--IsA-- Safety <--RelatedTo--> Medicine <--RelatedTo--> Drug <--RelatedTo--> Pot 
Force <--RelatedTo--> Armed <--RelatedTo--> Duty <--RelatedTo--> Army 