R. Artstein and M. Poesio, Inter-coder agreement for computational linguistics, Comput. Linguist, vol.34, pp.555-596, 2008.

F. Bouchet, Characterization of Conversational Activities in a Corpus of Assistance Requests, Proc. of ESSLLI, pp.40-50, 2009.

F. Bouchet, J. M. Harley, G. J. Trevors, and R. Azevedo, Clustering and Profiling Students According to their Interactions with an Intelligent Tutoring System Fostering Self-Regulated Learning, J. Educ. Data Min, vol.5, pp.104-146, 2013.

M. Cakir, F. Xhafa, N. Zhou, and G. Stahl, Thread-based analysis of patterns of collaborative interaction in chat, Proc. of AI in Education, 2005.

Y. Cao, F. Liu, P. Simpson, L. Antieau, A. Bennett et al., AskHERMES: An online question answering system for complex clinical questions, J. of Biomedical Informatics, vol.44, pp.277-288, 2011.

C. Chin and D. E. Brown, Student-generated questions: A meaningful aspect of learning in science, International J. of Science Education, vol.24, pp.521-549, 2002.

C. Chin and J. Osborne, Students' questions: a potential resource for teaching and learning science. Studies in Science Education, vol.44, pp.1-39, 2008.

M. Efron and M. Winget, Questions are content: a taxonomy of questions in a microblogging environment, Proc. of the Association for Information Science and Technology, vol.47, pp.1-10, 2010.

A. C. Graesser and N. K. Person, Question asking during tutoring. American educational research j, vol.31, pp.104-137, 1994.

J. Kim, E. Shaw, and S. Ravi, Mining Student Discussions for Profiling Participation and Scaffolding Learning. Handbook of Educational Data Mining, pp.299-310, 2010.

X. Li and D. Roth, Learning Question Classifiers: The Role of Semantic Information, Natural Language Engineering, vol.12, issue.3, pp.229-249, 2006.

Q. Liu, W. Peng, F. Zhang, R. Hu, Y. Li et al., The Effectiveness of Blended Learning in Health Professions: Systematic Review and Meta-Analysis, J. of Medical Internet Research, vol.18, p.1, 2016.

Y. Marom and I. Zukerman, Corpus-based Generation of Easy Help-desk Responses, 2005.

E. Shaw, Assessing and Scaffolding Collaborative Learning in Online Discussions, Proc. of AI in Education, pp.587-594, 2005.

A. Soller and A. Lesgold, A Computational Approach to Analyzing Online Knowledge Sharing Interaction, Proc. of AI in Education, pp.253-260, 2003.

J. Sullins, D. S. Mcnamara, S. Acuff, D. Neely, E. Hildebrand et al., Are You Asking the Right Questions: The Use of Animated Agents to Teach Learners to Become Better Question Askers, FLAIRS, pp.479-482, 2015.

D. Zhang and W. S. Lee, Question classification using support vector machines, Proc. of the 26th annual int. ACM SIGIR conf. on Research and development in information retrieval, pp.26-32, 2003.