Paolo Torroni (Università di Bologna, Italy) and Simone Gabbriellini (Università degli Studi di Brescia, Italy) developed TwitterArg, a NetLogo model for analyzing microdebates i.e., streams of Tweets about a certain topic, tagged so as to mark opinions and relations between opinions. Arguments are built bottom-up around opinions, by grouping together Tweets about the same opinion. TwittterArg uses ConArg, a CP-based Java reasoner to compute the semantics of abstract argumentation frameworks in an efficient way. Arguments may have different weights, based on the number of Tweets or re-Tweets.