%0 Journal Article %T Automated Delineation of Subgroups in Web Video: A Medical Activism Case Study %A Chin, Alvin %A Keelan, Jennifer %A Tomlinson, George %A Pavri-Garcia, Vera %A Wilson, Kumanan %A Chignell, Mark %J Journal of Computer-Mediated Communication %V 15 %N 3 %P 447-464 %D 2010-04-01 %I International Communication Association %~ DeepDyve