Dawn is related to Sun. Sun can be used for Light. Light is related to Emission. 
Exchange is related to Receive. Receive is related to Listen. one thing you do when you Listen is Learn. Learn is related to Classroom. 
Dawn <--RelatedTo--> Sun --UsedFor--> Light <--RelatedTo--> Emission 
Exchange <--RelatedTo--> Receive <--RelatedTo--> Listen --HasSubevent--> Learn <--RelatedTo--> Classroom 