Length is a type of Extent. Length is related to Long. 
Audience is a synonym of Hearing. Hearing is related to Action. Action is related to Rebel. Rebel is related to Opposition. 
Extent <--IsA-- Length <--RelatedTo--> Long 
Audience <--Synonym--> Hearing <--RelatedTo--> Action <--RelatedTo--> Rebel <--RelatedTo--> Opposition 