Professor is related to Lecture. Lecture is related to Lesson. Lesson is related to Primary. 
Format is a type of Divide. Format is part of Publication. Read is a type of Publication. Reader is derived from Read. 
Professor <--RelatedTo--> Lecture <--RelatedTo--> Lesson <--RelatedTo--> Primary 
Divide <--IsA-- Format --PartOf--> Publication <--IsA-- Read <--DerivedFrom-- Reader 