Interpret is a type of Understand. Read is a type of Interpret. Read is a type of Have. 
Lighting is related to Burn. Burn is related to Excessive. Excessive is a synonym of Extreme. Extreme is related to Pain. 
Understand <--IsA-- Interpret <--IsA-- Read --IsA--> Have 
Lighting <--RelatedTo--> Burn <--RelatedTo--> Excessive <--Synonym--> Extreme <--RelatedTo--> Pain 