Timeline Generation: Tracking individuals on Twitter - We have always been eager to keep track of what happened people we are interested in. For example, businessmen wish to know the background of his competitors, fans wish getting the first-time news about their favorite movie stars or athletes. However time-line generation, for individuals, especially ordinary individuals (not celebrities), still remains an open problem due to the lack of available data. #Twitter, where users report real-time events in their daily lives, serves as a potentially important source for this task.

http://arxiv.org/abs/1309.7313