Deadly is related to Disease. Boil is a type of Disease. Boil is related to Heat. 
Play is a type of Exploit. Play is a type of Show. Show is a synonym of Testify. 
Deadly <--RelatedTo--> Disease <--IsA-- Boil <--RelatedTo--> Heat 
Exploit <--IsA-- Play --IsA--> Show <--Synonym--> Testify 