Execution is a type of Penalty. Penalty is a synonym of Sentence. Sentence is related to Answer. Answer is related to Difference. 
Bill is related to Expensive. Expensive is related to Dear. Dear is related to Lovely. 
Execution --IsA--> Penalty <--Synonym--> Sentence <--RelatedTo--> Answer <--RelatedTo--> Difference 
Bill <--RelatedTo--> Expensive <--RelatedTo--> Dear <--RelatedTo--> Lovely 