Understanding engagement with insurgents through retweet rhetoric Joel Nothman author Atif Ahmad author Christoph Breidbach author David Malet author Timothy Baldwin author 2015-12 text Proceedings of the Australasian Language Technology Association Workshop 2015 Ben Hachey editor Kellie Webster editor Parramatta, Australia conference publication nothman-etal-2015-understanding https://aclanthology.org/U15-1015/ 2015-12 122 127