9. A method comprising: receiving, at a computing system, an item of content from a user, the item of content comprising one or more first annotations, wherein the one or more first annotations comprise at least one designated tag; identifying a probability distribution of the one or more first annotations over two or more geographic locations based, at least in part, on a language model; smoothing the probability distribution based, at least in part, on annotation-specific smoothing with the item of content based, at least in part on a smoothing coefficient, wherein the smoothing coefficient for a particular annotation is proportional to a spatial ambiguity of the annotation; receiving one or more second annotations; and wherein in response to receiving the one or more second annotations, determining one or more of the geographical locations corresponding to the one or more second annotations based, at least in part, on the smoothed probability distribution.
12. The method of claim 9 , wherein the one or more first or second annotations include at least one of: a tag, a title, a description, a keyword of a query, or a comment.