Behind the Times: Detecting Epoch Changes using Large Corpora Octavian Popescu author Carlo Strapparava author 2013-10 text Proceedings of the Sixth International Joint Conference on Natural Language Processing Ruslan Mitkov editor Jong C Park editor Asian Federation of Natural Language Processing Nagoya, Japan conference publication popescu-strapparava-2013-behind https://aclanthology.org/I13-1040/ 2013-10 347 355