Hard is related to Practice. Practice is a synonym of Workout. Workout is related to Exercise. the first thing you do when you Exercise is Weigh. 
Car is related to Small. Small is related to Cart. 
Hard <--RelatedTo--> Practice <--Synonym--> Workout <--RelatedTo--> Exercise --HasFirstSubevent--> Weigh 
Car <--RelatedTo--> Small <--RelatedTo--> Cart 