Math is related to Sum. Sum is related to Profit. Profit is related to Extra. Extra is related to Copy. 
Mark is related to Excellent. Excellent is related to Description. Description is related to Position. Presentation is a type of Position. 
Math <--RelatedTo--> Sum <--RelatedTo--> Profit <--RelatedTo--> Extra <--RelatedTo--> Copy 
Mark <--RelatedTo--> Excellent <--RelatedTo--> Description <--RelatedTo--> Position <--IsA-- Presentation 