Side is a type of Line. Line is related to Divide. 
Voice is related to People. you are likely to find People in/at/on Building. Building is related to House. House is related to President. 
Side --IsA--> Line <--RelatedTo--> Divide 
Voice <--RelatedTo--> People --AtLocation--> Building <--RelatedTo--> House <--RelatedTo--> President 