Sport is related to Bat. Bat is related to Good. Good is related to Nutrient. Fat is a type of Nutrient. 
Age is related to History. History is related to Class. Freshman is a type of Class. 
Sport <--RelatedTo--> Bat <--RelatedTo--> Good <--RelatedTo--> Nutrient <--IsA-- Fat 
Age <--RelatedTo--> History <--RelatedTo--> Class <--IsA-- Freshman 