you are likely to find Clock in/at/on Airport. Clock is related to Indication. Gesture is a type of Indication. 
Secondary is related to College. College is related to Student. you are likely to find Student in/at/on University. University is a type of Establishment. 
Airport <--AtLocation-- Clock <--RelatedTo--> Indication <--IsA-- Gesture 
Secondary <--RelatedTo--> College <--RelatedTo--> Student --AtLocation--> University --IsA--> Establishment 