This is a competition to see who can write the best software that can analyse text from a training corpus and learn how to identify the age and gender of the author of some previously unseen text. There is a cash prize of 300 euros for the winner.
http://www.uni-weimar.de/medien/webis/research/events/pan-14/pan14-web/author-profiling.html
While this isn’t exactly a chat bot contest it does seek to advance the capabilities of a very important aspect of chat bot software development.
Also, 300 euros.