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: "optimizing phylogenetic supertrees using answer set programming"
  Abstract: The supertree construction problem is about combining several phylogenetic trees with possibly conflicting information into a single tree that has all the leaves of the source trees as its leaves and the relationships between the leaves are as consistent with the source trees as possible. This leads to an optimization problem that is computationally challenging and typically heuristic methods, such as matrix representation with parsimony (MRP), are used. In this paper we consider the use of answer set programming to solve the supertree construction problem in terms of two alternative encodings. The first is based on an existing encoding of trees using substructures known as quartets, while the other novel encoding captures the relationships present in trees through direct projections. We use these encodings to compute a genus-level supertree for the family of cats (Felidae). Furthermore, we compare our results to recent supertrees obtained by the MRP method.

Connected through hyperedge HE-1 (induced by source paper "the seventh answer set programming competition design and results"):
  with members:
    - "efficiently coupling the i dlv grounder with asp solvers"
    - "optimizing answer set computation via heuristic based decomposition"
    - "on the computation of paracoherent answer sets"
    - "casp solutions for planning in hybrid domains"
    - "stable unstable semantics beyond np with normal logic programs"
    - "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"
    - "dynamic consistency checking in goal directed answer set programming"

Connected through hyperedge HE-2 (induced by source paper "the external interface for extending wasp"):
  with members:
    - "shared aggregate sets in answer set programming"
    - "constraint answer set solver ezcsp and why integration schemas matter"
    - "constraints lazy constraints or propagators in asp solving an empirical analysis"
    - "combining answer set programming and domain heuristics for solving hard industrial problems application paper"
    - "modeling variations of first order horn abduction in answer set programming"
    - "generating explanations for biomedical queries"
    - "clingo asp control preliminary report"
    - "asp modulo csp the clingcon system"

Connected through hyperedge HE-3 (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"
    - "anytime answer set optimization via unsatisfiable core shrinking"
    - "justifying answer sets using argumentation"
    - "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-4 (induced by source paper "partial compilation of asp programs"):
  with members:
    - "the external interface for extending wasp"
    - "constraint answer set solver ezcsp and why integration schemas matter"
    - "constraints lazy constraints or propagators in asp solving an empirical analysis"
    - "a model building framework for answer set programming with external computations"
    - "asperix a first order forward chaining approach for answer set computing"
    - "asp modulo csp the clingcon system"
    - "modularity aspects of disjunctive stable models"
    - "the dlv system for knowledge representation and reasoning"

Connected through hyperedge HE-5 (induced by source paper "constraints lazy constraints or propagators in asp solving an empirical analysis"):
  with members:
    - "constraint answer set solver ezcsp and why integration schemas matter"
    - "the power of non ground rules in answer set programming"
    - "combining answer set programming and domain heuristics for solving hard industrial problems application paper"
    - "a model building framework for answer set programming with external computations"
    - "modeling variations of first order horn abduction in answer set programming"
    - "the dlvhex system for knowledge representation recent advances system description"
    - "generating explanations for biomedical queries"
    - "lazy model expansion interleaving grounding with search"

Connected through hyperedge HE-6 (induced by source paper "stable unstable semantics beyond np with normal logic programs"):
  with members:
    - "predicate logic as a modeling language modeling and solving some machine learning and data mining problems with idp3"
    - "simulating dynamic systems using linear time calculus theories"
    - "complex optimization in answer set programming"
    - "the dlv system for knowledge representation and reasoning"
    - "towards automated integration of guess and check programs in answer set programming a meta interpreter and applications"
    - "unfolding partiality and disjunctions in stable model semantics"
    - "stable models and an alternative logic programming paradigm"

Connected through hyperedge HE-7 (induced by source paper "combining answer set programming and domain heuristics for solving hard industrial problems application paper"):
  with members:
    - "ooasp connecting object oriented and logic programming"
    - "improved answer set programming encodings for abstract argumentation"
    - "generating explanations for biomedical queries"
    - "a multi engine approach to answer set programming"
    - "claspfolio 2 advances in algorithm selection for answer set programming"

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.CE(Computational Engineering, Finance, and Science)