Ski is a type of Runner. Runner is a type of Athlete. Sport is a type of Athlete. Sport is related to Sweat. 
Researcher is derived from Research. Research is related to Information. Article is made of Information. 
Ski --IsA--> Runner --IsA--> Athlete <--IsA-- Sport <--RelatedTo--> Sweat 
Researcher --DerivedFrom--> Research <--RelatedTo--> Information <--MadeOf-- Article 