Authority is related to Captain. Captain is related to Commander. Commander is a type of Person. Person is related to Fellow. 
Scream is related to Speech. Spell is a type of Speech. Spell is a synonym of Comprise. 
Authority <--RelatedTo--> Captain <--RelatedTo--> Commander --IsA--> Person <--RelatedTo--> Fellow 
Scream <--RelatedTo--> Speech <--IsA-- Spell <--Synonym--> Comprise 