Contents Volume 35, Issue 1, 2009 Complex Question Answering: Unsupervised Learning Approaches and Experiments . . . . . . . . . . . . . . . . . . . . 1 Y. Chali, S. R. Joty, and S. A. Hasan Message-Based Web Service Composition, Integrity Constraints, and Planning under Uncertainty: A New Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 J. Hoffmann, P. Bertoli, M. Helmert, and M. Pistore Trust-Based Mechanisms for Robust and Efficient Task Allocation in the Presence of Execution Uncertainty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .119 S. D. Ramchurn, C. Mezzetti, A. Giovannucci, J. A. Rodriguez-Aguilar, R. K. Dash, and N. R. Jennings Eliciting Single-Peaked Preferences Using Comparison Queries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161 V. Conitzer Transductive Rademacher Complexity and its Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193 R. El-Yaniv and D. Pechyony A Bilinear Programming Approach for Multiagent Planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235 M. Petrik and S. Zilberstein Llull and Copeland Voting Computationally Resist Bribery and Constructive Control . . . . . . . . . . . . . . . . . . . 275 P. Faliszewski, E. Hemaspaandra, L. A. Hemaspaandra, and J. Rothe Automated Reasoning in Modal and Description Logics via SAT Encoding: The Case Study of Km/ALC-Satisfiability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 343 R. Sebastiani and M. Vescovi Learning Bayesian Network Equivalence Classes with Ant Colony Optimization . . . . . . . . . . . . . . . . . . . . . . . . 391 R. Daly and Q. Shen J ournal of Artificial Intelligence Research AN INTERNATIONAL ELECTRONIC AND PRINT JOURNAL Editors and Staff, 2009 Editor-in-Chief Adnan Darwiche Associate Editor-in-Chief Shlomo Zilberstein Associate Editors Chitta Baral Regina Barzilay Christian Bessiere Ronen Brafman Gerhard Brewka Vincent Conitzer Giuseppe De Giacomo Dieter Fox Hector Geffner Lise Getoor Joerg Hoffman Adele Howe Thorsten Joachims Jerome Lang Lillian Lee Kevin Leyton-Brown Shaul Markovitch Chris Meek Pedro Meseguer Andrew Ng Dragomir Radev Jeff Rosenschein Sylvie Thiebaux Gerard Verfaillie Michael Wooldridge Editorial Board Blai Bonet David Blei Yiling Chen Yixin Chen Xiaoping Chen David Chiang Alessandro Cimatti Minh Dinh Do Prashant Doshi Stefan Edelkamp Edith Elkind Alan Fern Amir Globerson Judy Goldsmith Eric Hansen Patrik Haslum Malte Helmert Holger Hoos Manfred Jaeger Kristian Kersting Dan Klein Javier Larrosa Kathryn Laskey Felip Manya Lluis Marquez Pierre Marquis Hwee Tou Ng Ilkka Niemela Bo Pang Simon Parsons Joelle Pineau Pascal Poupart Ariel Procaccia Daniel Reeves Riccardo Rosati Wheeler Ruml Ashish Sabharwal Lakhdar Sais Torsten Schaub Christian Shelton Tobias Scheffer Thomas Schiex Ben Taskar Kristen Venable Kiri Wagstaff Neil Yorke-Smith Jia-Huai You Advisory Board Fahiem Bacchus Peter Bartlett Walter Daelemans Rina Dechter Luc De Raedt Oren Etzioni Boi Faltings Maria Fox Russell Greiner Subbarao Kambhampati Sven Koenig Gerhard Lakemeyer Paolo Liberatore Fangzhen Lin Daniel Marcu Steven Minton Martha Pollack Francesca Rossi Diana Spears Milind Tambe Moshe Tennenholtz Michael Wellman Makoto Yokoo Nevin Zhang Toby Walsh Dan Weld Managing Editor Steven Minton Special Projects Toby Walsh Production Supervisor Lillian Bluestein About JAIR Subscriptions JAIR's editorial board is dedicated to the rapid dissemination of important research results to the global AI community. 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