Room is related to Separation. Removal is a type of Separation. 
Sure is a different concept from Uncertainty. Worry is created by Uncertainty. the last thing you do when you Lie is Worry. Lie is related to Boast. 
Room <--RelatedTo--> Separation <--IsA-- Removal 
Sure <--DistinctFrom--> Uncertainty <--CreatedBy-- Worry <--HasLastSubevent-- Lie <--RelatedTo--> Boast 