Concept is related to Desire. Desire is related to Sexual. 
Impose is a synonym of Enforce. Enforce is a synonym of Nerve. Nerve is related to Pain. Burn is a type of Pain. 
Concept <--RelatedTo--> Desire <--RelatedTo--> Sexual 
Impose <--Synonym--> Enforce <--Synonym--> Nerve <--RelatedTo--> Pain <--IsA-- Burn 