Person wants (to) Hold. Hold is related to Limit. Number is a type of Limit. 
Swim is related to Lesson. Lesson is related to Learn. University can be used for Learn. you are likely to find Writer in/at/on University. 
Person --Desires--> Hold <--RelatedTo--> Limit <--IsA-- Number 
Swim <--RelatedTo--> Lesson <--RelatedTo--> Learn <--UsedFor-- University <--AtLocation-- Writer 