you are likely to find Noise in/at/on Classroom. Noise is the opposite of Signal. Signal is related to Simple. 
Dock is related to Wood. Wood is related to Boat. you are likely to find Boat in/at/on Water. Water is a type of Chemical. 
Classroom <--AtLocation-- Noise <--Antonym--> Signal <--RelatedTo--> Simple 
Dock <--RelatedTo--> Wood <--RelatedTo--> Boat --AtLocation--> Water --IsA--> Chemical 