Carpet is related to Hair. you are likely to find Hair in/at/on Drain. 
Union is a synonym of North. you are likely to find Snow in/at/on North. Snow is related to Board. Board is related to Device. 
Carpet <--RelatedTo--> Hair --AtLocation--> Drain 
Union <--Synonym--> North <--AtLocation-- Snow <--RelatedTo--> Board <--RelatedTo--> Device 