Race is related to Line. Line is related to Factory. Factory is related to Working. 
Seat is a type of Company. Seat is part of Skirt. Skirt is related to Knee. 
Race <--RelatedTo--> Line <--RelatedTo--> Factory <--RelatedTo--> Working 
Company <--IsA-- Seat --PartOf--> Skirt <--RelatedTo--> Knee 