Smoke is related to Exhaust. Exhaust is a synonym of Weaken. Weaken is derived from Weak. Weak is related to Delicate. 
Effort is a type of Labor. Effort is related to Afford. 
Smoke <--RelatedTo--> Exhaust <--Synonym--> Weaken --DerivedFrom--> Weak <--RelatedTo--> Delicate 
Labor <--IsA-- Effort <--RelatedTo--> Afford 