Stance Classification in Rumours as a Sequential Task Exploiting the Tree Structure of Social Media Conversations Arkaitz Zubiaga author Elena Kochkina author Maria Liakata author Rob Procter author Michal Lukasik author 2016-12 text Proceedings of COLING 2016, the 26th International Conference on Computational Linguistics: Technical Papers Yuji Matsumoto editor Rashmi Prasad editor The COLING 2016 Organizing Committee Osaka, Japan conference publication zubiaga-etal-2016-stance https://aclanthology.org/C16-1230/ 2016-12 2438 2448