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: "computing preferred answer sets by meta interpretation in answer set programming"
  Abstract: Most recently, Answer Set Programming (ASP) has been attracting interest as a new paradigm for problem solving. An important aspect, for which several approaches have been presented, is the handling of preferences between rules. In this paper, we consider the problem of implementing preference handling approaches by means of meta-interpreters in Answer Set Programming. In particular, we consider the preferred answer set approaches by Brewka and Eiter, by Delgrande, Schaub and Tompits, and by Wang, Zhou and Lin. We present suitable meta-interpreters for these semantics using DLV, which is an efficient engine for ASP. Moreover, we also present a meta-interpreter for the weakly preferred answer set approach by Brewka and Eiter, which uses the weak constraint feature of DLV as a tool for expressing and solving an underlying optimization problem. We also consider advanced meta-interpreters, which make use of graph-based characterizations and often allow for more efficient computations. Our approach shows the suitability of ASP in general and of DLV in particular for fast prototyping. This can be fruitfully exploited for experimenting with new languages and knowledge-representation formalisms.

Connected through hyperedge HE-1 (induced by source paper "generalizing modular logic programs"):
  with members:
    - "modularity aspects of disjunctive stable models"
    - "weight constraints as nested expressions"
    - "strong equivalence made easy nested expressions and weight constraints"
    - "stable models and an alternative logic programming paradigm"

Connected through hyperedge HE-2 (induced by source paper "a family of descriptive approaches to preferred answer sets"):
  with members:
    - "a semantic framework for preference handling in answer set programming"
    - "a framework for compiling preferences in logic programs"
    - "well founded semantics for extended logic programs with dynamic preferences"

Connected through hyperedge HE-3 (induced by source paper "controlled natural language processing as answer set programming an experiment"):
  with members:
    - "a survey and classification of controlled natural languages"

Connected through hyperedge HE-4 (induced by source paper "complex optimization in answer set programming"):
  with members:
    - "catching the ouroboros on debugging non ground answer set programs"
    - "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"
    - "a framework for compiling preferences in logic programs"

Connected through hyperedge HE-5 (induced by source paper "a general approach to belief change in answer set programming"):
  with members:
    - "propositional theories are strongly equivalent to logic programs"
    - "the dlv system for knowledge representation and reasoning"
    - "updates in answer set programming an approach based on basic structural properties"
    - "towards automated integration of guess and check programs in answer set programming a meta interpreter and applications"
    - "strong equivalence made easy nested expressions and weight constraints"
    - "a framework for compiling preferences in logic programs"
    - "on properties of update sequences based on causal rejection"

Connected through hyperedge HE-6 (induced by source paper "the dlv system for knowledge representation and reasoning"):
  with members:
    - "unfolding partiality and disjunctions in stable model semantics"
    - "answer set planning under action costs"
    - "a logic programming approach to knowledge state planning ii the dlv k system"
    - "a polynomial translation of logic programs with nested expressions into disjunctive logic programs preliminary report"
    - "disjunctive logic programs with inheritance"
    - "on properties of update sequences based on causal rejection"
    - "propositional satisfiability in answer set programming"
    - "dlv a system for declarative problem solving"

Connected through hyperedge HE-7 (induced by source paper "towards automated integration of guess and check programs in answer set programming a meta interpreter and applications"):
  with members:
    - "the dlv system for knowledge representation and reasoning"
    - "an abductive framework for computing knowledge base updates"
    - "on the expressibility of stable logic programming"
    - "diagnostic reasoning with a prolog"
    - "a logic programming approach to knowledge state planning ii the dlv k system"
    - "on properties of update sequences based on causal rejection"
    - "conformant planning via symbolic model checking"
    - "dlv a system for declarative problem solving"

Connected through hyperedge HE-8 (induced by source paper "on the expressibility of stable logic programming"):
  with members:
    - "stable models and an alternative logic programming paradigm"

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)