you are likely to find Human in/at/on Downtown. Human is related to Leg. Leg is related to Park. you are likely to find Stranger in/at/on Park. 
one thing you do when you College is Learn. College is a type of Station. 
Downtown <--AtLocation-- Human <--RelatedTo--> Leg <--RelatedTo--> Park <--AtLocation-- Stranger 
Learn <--HasSubevent-- College --IsA--> Station 