Servant is related to Aide. Aide is related to Help. Help is related to Request. Appeal is a type of Request. 
Exercise is a type of Lesson. you are likely to find Exercise in/at/on Gym. Gym is a type of Place. you are likely to find System in/at/on Place. 
Servant <--RelatedTo--> Aide <--RelatedTo--> Help <--RelatedTo--> Request <--IsA-- Appeal 
Lesson <--IsA-- Exercise --AtLocation--> Gym --IsA--> Place <--AtLocation-- System 