World can be used for Live. Live is a synonym of Be. Prove is a type of Be. Prove is a synonym of Depict. 
Pull is a synonym of Recall. Recall is a type of Request. Request is a synonym of Invite. Challenge is a type of Invite. 
World --UsedFor--> Live <--Synonym--> Be <--IsA-- Prove <--Synonym--> Depict 
Pull <--Synonym--> Recall --IsA--> Request <--Synonym--> Invite <--IsA-- Challenge 