Helmet is related to Wear. one thing you do when you Driving is Wear. one thing you do when you Driving is Crash. 
Comfort is a type of Condition. Comfort is a type of Relieve. 
Helmet <--RelatedTo--> Wear <--HasSubevent-- Driving --HasSubevent--> Crash 
Condition <--IsA-- Comfort --IsA--> Relieve 