Travel is related to Swim. Swim is related to People. People is related to Army. Army can be used for Protection. 
Recovery is derived from Recover. Rescue is a type of Recovery. Rescue is a synonym of Free. Free is related to Library. 
Travel <--RelatedTo--> Swim <--RelatedTo--> People <--RelatedTo--> Army --UsedFor--> Protection 
Recover <--DerivedFrom-- Recovery <--IsA-- Rescue <--Synonym--> Free <--RelatedTo--> Library 