4. The method of claim 1 , comprising: determining a relationship between the first geographic entity name and the second geographic entity name in a geographic data set that includes a plurality of names of geographic entities and respective relationships between pairs of geographic entities, wherein determining that the second geographic entity name is identified as not a substitute term for the first geographic entity name by the second substitution framework is based at least in part on the determined relationship.
4. The method of claim 1 , comprising: determining a relationship between the first geographic entity name and the second geographic entity name in a geographic data set that includes a plurality of names of geographic entities and respective relationships between pairs of geographic entities, wherein determining that the second geographic entity name is identified as not a substitute term for the first geographic entity name by the second substitution framework is based at least in part on the determined relationship. 5. The method of claim 4 , 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.