Marine is related to Soldier. Soldier is a type of Warrior. Warrior is related to Fighting. 
Step is related to Individual. Individual is related to Drop. Drop is related to Long. Long is a synonym of Extended. 
Marine <--RelatedTo--> Soldier --IsA--> Warrior <--RelatedTo--> Fighting 
Step <--RelatedTo--> Individual <--RelatedTo--> Drop <--RelatedTo--> Long <--Synonym--> Extended 