Invention is related to Wheel. Cycle is etymologically related to Wheel. 
Elect is related to Presidential. Presidential is related to Debate. Debate is a synonym of Argue. 
Invention <--RelatedTo--> Wheel <--EtymologicallyRelatedTo-- Cycle 
Elect <--RelatedTo--> Presidential <--RelatedTo--> Debate <--Synonym--> Argue 