Scan is a type of Examination. Beam can be used for Scan. 
Percentage is a type of Proportion. Content is a type of Proportion. Universe is a type of Content. Universe wants (to) Mess. 
Examination <--IsA-- Scan <--UsedFor-- Beam 
Percentage --IsA--> Proportion <--IsA-- Content <--IsA-- Universe --Desires--> Mess 