Electricity is related to Power. Powerful is derived from Power. 
Attorney is a different concept from Judge. Test is a type of Judge. Test is related to Paper. Paper is related to Rough. 
Electricity <--RelatedTo--> Power <--DerivedFrom-- Powerful 
Attorney <--DistinctFrom--> Judge <--IsA-- Test <--RelatedTo--> Paper <--RelatedTo--> Rough 