you are likely to find Entrance in/at/on Stadium. you are likely to find Athlete in/at/on Stadium. you are likely to find Athlete in/at/on Olympics. Olympics is derived from Olympic. 
Explode is a synonym of Fly. Fly is related to Cry. Cry is related to Do. 
Entrance --AtLocation--> Stadium <--AtLocation-- Athlete --AtLocation--> Olympics --DerivedFrom--> Olympic 
Explode <--Synonym--> Fly <--RelatedTo--> Cry <--RelatedTo--> Do 