Paper is related to Present. Present is a synonym of Actual. Actual is related to Real. Real is the opposite of Virtual. 
Heart is a synonym of Nerve. Nerve is a synonym of Enforce. Enforce is a synonym of Impose. 
Paper <--RelatedTo--> Present <--Synonym--> Actual <--RelatedTo--> Real <--Antonym--> Virtual 
Heart <--Synonym--> Nerve <--Synonym--> Enforce <--Synonym--> Impose 