Invited Talks -- The Design of the Seventh Answer Set Programming Competition -- A Bird’s-Eye View of Forgetting in Answer-Set Programming -- Answer Set Programming and its Applications in Planning and Multi-Agent Systems -- From logic programming and non-monotonic reasoning to computational argumentation and beyond. - Nonmonotonic Reasoning Modular Construction of Minimal Models -- A Hasse Diagram for Weighted Sceptical Semantics with a Unique-status Grounded Semantics -- Foundations For A Probabilistic Event Calculus -- Contextual Reasoning: Usually Birds can Abductively Fly -- Including Quantification in Defeasible Reasoning for the Description Logic EL bot -- A Monotonic View on Reflexive Autoepistemic Reasoning -- The Minimal Inference Problem over Finite Domains: The Landscape of Complexity -- Answer Set Programming -- Gelfond-Zhang aggregates as propositional formulas -- Answer Set Solving with Bounded Treewidth Revisited -- Vicious Circle Principle and Formation of Sets in ASP Based Languages -- Answer Set Programs with Queries over Subprograms -- Explaining Inconsistency in Answer Set Programs and Extensions -- Blending Lazy-Grounding and CDNL Search for Answer-Set Solving -- Answer Set Programming with Graded Modality -- LPNMR Systems -- The ASP System DLV2 -- lp2normal - A Normalization Tool for Extended Logic Programs -- Harvey: A System for Random Testing in ASP -- NoHR: Integrating XSB Prolog with the OWL 2 Profiles and Beyond -- ArgueApply: A Mobile App for Argumentation -- LPNMR Applications -- catnap: Generating Test Suites of Constrained Combinatorial Testing with Answer Set Programming -- Automatic Synthesis of Optimal-Size Concentrators by Answer Set Programming -- plasp 3: Towards effective ASP Planning -- Nurse Scheduling via Answer Set Programming -- Hybrid Metabolic Network Completion -- Action Language Hybrid AL -- moviola: Interpreting Dynamic Logic Programs via Multi-shot Answer Set Programming -- Adjudication of Coreference Annotations via Answer Set Optimization. .