you are likely to find Flag in/at/on Classroom. you are likely to find Book in/at/on Classroom. Book is related to Document. Prescription is a type of Document. 
Hurry is a synonym of Run. Run is related to Fast. Fast is a synonym of Flying. 
Flag --AtLocation--> Classroom <--AtLocation-- Book <--RelatedTo--> Document <--IsA-- Prescription 
Hurry <--Synonym--> Run <--RelatedTo--> Fast <--Synonym--> Flying 