human: Given a node-centered hypergraph: <hypergraph>, where nodes represent papers and hyperedges represent sets of papers co-cited by a source paper.

Details of the hypergraph:
Center node: "anytime answer set optimization via unsatisfiable core shrinking"
  Abstract: Unsatisfiable core analysis can boost the computation of optimum stable models for logic programs with weak constraints. However, current solvers employing unsatisfiable core analysis either run to completion, or provide no suboptimal stable models but the one resulting from the preliminary disjoint cores analysis. This drawback is circumvented here by introducing a progression based shrinking of the analyzed unsatisfiable cores. In fact, suboptimal stable models are possibly found while shrinking unsatisfiable cores, hence resulting into an anytime algorithm. Moreover, as confirmed empirically, unsatisfiable core analysis also benefits from the shrinking process in terms of solved instances. This paper is under consideration for acceptance in TPLP.

Connected through hyperedge HE-1 (induced by source paper "efficiently coupling the i dlv grounder with asp solvers"):
  with members:
    - "combining answer set programming and domain heuristics for solving hard industrial problems application paper"
    - "asperix a first order forward chaining approach for answer set computing"
    - "predicate logic as a modeling language modeling and solving some machine learning and data mining problems with idp3"
    - "a multi engine approach to answer set programming"
    - "claspfolio 2 advances in algorithm selection for answer set programming"
    - "team building with answer set programming in the gioia tauro seaport"
    - "satzilla portfolio based algorithm selection for sat"
    - "the dlv system for knowledge representation and reasoning"

Connected through hyperedge HE-2 (induced by source paper "debugging non ground asp programs technique and graphical tools"):
  with members:
    - "combining answer set programming and domain heuristics for solving hard industrial problems application paper"
    - "justifying answer sets using argumentation"
    - "optimizing phylogenetic supertrees using answer set programming"
    - "generating explanations for biomedical queries"
    - "a web based ide for idp"
    - "the third open answer set programming competition"
    - "unit testing in aspide"
    - "catching the ouroboros on debugging non ground answer set programs"

Connected through hyperedge HE-3 (induced by source paper "abstract solvers for computing cautious consequences of asp programs"):
  with members:
    - "cautious reasoning in asp via minimal models and unsatisfiable cores"
    - "anytime computation of cautious consequences in answer set programming"
    - "the third open answer set programming competition"
    - "transition systems for model generators a unifying approach"
    - "consistent query answering via asp from different perspectives theory and practice"
    - "the dlv system for knowledge representation and reasoning"
    - "flux a logic programming method for reasoning agents"
    - "answer sets for consistent query answering in inconsistent databases"

Connected through hyperedge HE-4 (induced by source paper "better paracoherent answer sets with less resources"):
  with members:
    - "on the computation of paracoherent answer sets"
    - "multi shot asp solving with clingo"
    - "query answering in resource based answer set semantics"
    - "combining answer set programming and domain heuristics for solving hard industrial problems application paper"
    - "improved answer set programming encodings for abstract argumentation"
    - "on the tractability of minimal model computation for some cnf theories"
    - "the dlv system for knowledge representation and reasoning"
    - "flux a logic programming method for reasoning agents"

Connected through hyperedge HE-5 (induced by source paper "enhancing magic sets with an application to ontological reasoning"):
  with members:
    - "shared aggregate sets in answer set programming"
    - "cautious reasoning in asp via minimal models and unsatisfiable cores"
    - "rewriting recursive aggregates in answer set programming back to monotonicity"
    - "anytime computation of cautious consequences in answer set programming"
    - "vicious circle principle and logic programs with aggregates"
    - "complexity of super coherence problems in asp"
    - "logic programs with propositional connectives and aggregates"
    - "well founded and stable semantics of logic programs with aggregates"

Connected through hyperedge HE-6 (induced by source paper "shared aggregate sets in answer set programming"):
  with members:
    - "asp core 2 input language format"
    - "constraints lazy constraints or propagators in asp solving an empirical analysis"
    - "clingcon the next generation"
    - "combining answer set programming and domain heuristics for solving hard industrial problems application paper"
    - "predicate logic as a modeling language modeling and solving some machine learning and data mining problems with idp3"
    - "complexity and compilation of gz aggregates in answer set programming"
    - "rewriting recursive aggregates in answer set programming back to monotonicity"
    - "vicious circle principle and logic programs with aggregates"

Connected through hyperedge HE-7 (induced by source paper "cautious reasoning in asp via minimal models and unsatisfiable cores"):
  with members:
    - "on the computation of paracoherent answer sets"
    - "model enumeration in propositional circumscription via unsatisfiable core analysis"
    - "combining answer set programming and domain heuristics for solving hard industrial problems application paper"
    - "anytime computation of cautious consequences in answer set programming"
    - "the third open answer set programming competition"
    - "consistent query answering via asp from different perspectives theory and practice"
    - "disjunctive asp with functions decidable queries and effective computation"
    - "the dlv system for knowledge representation and reasoning"

Connected through hyperedge HE-8 (induced by source paper "improving scalability of inductive logic programming via pruning and best effort optimisation"):
  with members:
    - "iiscnlp at semeval 2016 task 2 interpretable sts with ilp based multiple chunk aligner"
    - "modeling variations of first order horn abduction in answer set programming"
    - "learning weak constraints in answer set programming"
    - "incremental learning of event definitions with inductive logic programming"
    - "introduction to the conll 2000 shared task chunking"

Question: Please tell me which class the center node belongs to. The 40 classes are: cs.NA(Numerical Analysis), cs.MM(Multimedia), cs.LO(Logic in Computer Science), cs.CY(Computers and Society), cs.CR(Cryptography and Security), cs.DC(Distributed, Parallel, and Cluster Computing), cs.HC(Human-Computer Interaction), cs.CE(Computational Engineering, Finance, and Science), cs.NI(Networking and Internet Architecture), cs.CC(Computational Complexity), cs.AI(Artificial Intelligence), cs.MA(Multiagent Systems), cs.GL(General Literature), cs.NE(Neural and Evolutionary Computing), cs.SC(Symbolic Computation), cs.AR(Hardware Architecture), cs.CV(Computer Vision and Pattern Recognition), cs.GR(Graphics), cs.ET(Emerging Technologies), cs.SY(Systems and Control), cs.CG(Computational Geometry), cs.OH(Other Computer Science), cs.PL(Programming Languages), cs.SE(Software Engineering), cs.LG(Machine Learning), cs.SD(Sound), cs.SI(Social and Information Networks), cs.RO(Robotics), cs.IT(Information Theory), cs.PF(Performance), cs.CL(Computation and Language), cs.IR(Information Retrieval), cs.MS(Mathematical Software), cs.FL(Formal Languages and Automata Theory), cs.DS(Data Structures and Algorithms), cs.OS(Operating Systems), cs.GT(Computer Science and Game Theory), cs.DB(Databases), cs.DL(Digital Libraries), cs.DM(Discrete Mathematics). Directly output the class name.

gpt: cs.LO(Logic in Computer Science)