UKP Lab (Torsten Zesch, Chris Biemann) is co-organizing the SemEval-2013 task on phrasal semantics.
At the Fourteenth Conference on Computational Natural Language Learning (CoNLL-2010), colocated with ACL 2010 in Uppsala, Sweden, the UKP Lab (György Szarvas) co-organized the shared task "Learning to detect hedges and their scope in natural language text". You can download the shared task proceedings here.