djsuikysvcshelsinkifi hello good hierarchical clusteringcausal discoverygraphical modelinglink analysisphylogeneticsstringmatching chance prove pascal challenge computerassisted stemmatology evaluates methods reconstructing familytree group related documents familytree corresponds clustering hierarchy joined subgroups make subtrees b causalgraphical model interdocument dependencies c network information flow among documents phylogenetic tree etc many applicable techniques often applied unsupervised scenarios challenge presents opportunity compare different methods approaches supervised objective fashion show approach best prototypical example illustrating problem follows top ai researcher finally concluded 20 years statement tweety bird true rumour fact spreads around like wildfire becoming distorted along way set scientists submit papers uai08 claiming respectively sweety bird sweety bird tweety nerd deduce information spread among scientists interested know tweety fly sorry participation open information found webpage challenge httpwwwcshelsinkifiteemurooscasc schedule follows firstphase data available october 6 2006 secondphase data available november 30 2006 validation data available february 20 2007 submission deadline march 30 2007 results april 30 2007 see data already available including validata set correct incorrect solution httpwwwcshelsinkifiteemurooscascexamplehtml invite applications established particular novel approaches stemmatology including course restricted hierarchical clustering graphical modeling link analysis phylogenetics stringmatching etc quoting prof michele sebag manager pascal challenges programme beside fact pascal challenges widely known enjoyable also provide ml community new smart benchmarks hope live expectations organizers teemu roos helsinki inst information technology tuomas heikkilä dept history university helsinki petri myllymäki dept cs university helsinki behalf organizers teemu roos helsinki institute information technology thu 07 aug 2008 200135 0200 uai computerassisted stemmatology challenge