12. The system of claim 9 , wherein the geographic data set is a tree structure wherein different positions in the tree structure that share a same level correspond to different geographic locations that share a same geographic region type.
12. The system of claim 9 , wherein the geographic data set is a tree structure wherein different positions in the tree structure that share a same level correspond to different geographic locations that share a same geographic region type. 14. The system of claim 12 , wherein determining that the geographic entity name and the second geographic entity name have a particular relationship in a geographic data set comprises determining that a first position for the first geographic entity name in the tree structure and a second position for the second geographic entity name in the tree structure are at a same level in the tree structure.