File is related to Pile. Pile is a type of Put. Put is related to Sign. Sign is a type of Evidence. 
Square is a type of Conservative. you are likely to find Line in/at/on Square. Line is related to Main. 
File <--RelatedTo--> Pile --IsA--> Put <--RelatedTo--> Sign --IsA--> Evidence 
Conservative <--IsA-- Square <--AtLocation-- Line <--RelatedTo--> Main 