People can be Violent. you are likely to find People in/at/on Universe. you are likely to find Explosion in/at/on Universe. Explosion is related to Flash. 
Pressure is a type of Force. Force is related to Fire. Heat is created by Fire. 
Violent <--HasProperty-- People --AtLocation--> Universe <--AtLocation-- Explosion <--RelatedTo--> Flash 
Pressure --IsA--> Force <--RelatedTo--> Fire <--CreatedBy-- Heat 