you are likely to find Window in/at/on Classroom. Window is related to Construction. Construction is a type of Thinking. Thinking is related to Philosophy. 
Burden is related to Carry. Carry is a synonym of Keep. Keep is the opposite of Break. 
Classroom <--AtLocation-- Window <--RelatedTo--> Construction --IsA--> Thinking <--RelatedTo--> Philosophy 
Burden <--RelatedTo--> Carry <--Synonym--> Keep <--Antonym--> Break 