Middle is a type of Area. Middle is a synonym of Midst. Midst is a synonym of Thick. 
Continuing is a synonym of Chronic. Chronic is a type of Album. Greatest is an instance of Album. 
Area <--IsA-- Middle <--Synonym--> Midst <--Synonym--> Thick 
Continuing <--Synonym--> Chronic --IsA--> Album <--InstanceOf-- Greatest 