Radiation is a type of Energy. Energy is the opposite of Rest. Rest is related to Strength. 
Sandwich is a type of Insert. Sandwich is related to Butter. Butter is a type of Cover. Cover is related to Paint. 
Radiation --IsA--> Energy <--Antonym--> Rest <--RelatedTo--> Strength 
Insert <--IsA-- Sandwich <--RelatedTo--> Butter --IsA--> Cover <--RelatedTo--> Paint 