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: "revisiting epistemic specifications"
  Abstract: In 1991, Michael Gelfond introduced the language of epistemic specifications. The goal was to develop tools for modeling problems that require some form of meta-reasoning, that is, reasoning over multiple possible worlds. Despite their relevance to knowledge representation, epistemic specifications have received relatively little attention so far. In this paper, we revisit the formalism of epistemic specification. We offer a new definition of the formalism, propose several semantics (one of which, under syntactic restrictions we assume, turns out to be equivalent to the original semantics by Gelfond), derive some complexity results and, finally, show the effectiveness of the formalism for modeling problems requiring meta-reasoning considered recently by Faber and Woltran. All these results show that epistemic specifications deserve much more attention that has been afforded to them so far.

Connected through hyperedge HE-1 (induced by source paper "selp a single shot epistemic logic program solver"):
  with members:
    - "a survey of advances in epistemic logic program solvers"
    - "multi shot asp solving with clingo"
    - "the power of non ground rules in answer set programming"
    - "a parallel memory efficient epistemic logic program solver harder better faster"
    - "lpopt a rule optimization tool for answer set programming"
    - "clingo asp control preliminary report"
    - "well founded and stable semantics of logic programs with aggregates"

Connected through hyperedge HE-2 (induced by source paper "about epistemic negation and world views in epistemic logic programs"):
  with members:
    - "splitting epistemic logic programs"
    - "query answering in resource based answer set semantics"
    - "xsb extending prolog with tabled logic programming"
    - "normal forms for answer sets programming"
    - "on the existence of stable models of non stratified logic programs"
    - "transformation based bottom up computation of the well founded model"
    - "extremal problems in logic programming and stable model computation"

Connected through hyperedge HE-3 (induced by source paper "on uniform equivalence of epistemic logic programs"):
  with members:
    - "modularity aspects of disjunctive stable models"
    - "characterising equilibrium logic and nested logic programs reductions and complexity1 2"
    - "discovering classes of strongly equivalent logic programs"
    - "strong equivalence made easy nested expressions and weight constraints"

Connected through hyperedge HE-4 (induced by source paper "epistemic logic programs a different world view"):
  with members:
    - "characterising equilibrium logic and nested logic programs reductions and complexity1 2"
    - "discovering classes of strongly equivalent logic programs"
    - "strong equivalence made easy nested expressions and weight constraints"

Connected through hyperedge HE-5 (induced by source paper "founded world views with autoepistemic equilibrium logic"):
  with members:
    - "splitting epistemic logic programs"
    - "a survey of advances in epistemic logic program solvers"
    - "stable models and an alternative logic programming paradigm"

Connected through hyperedge HE-6 (induced by source paper "founded auto epistemic equilibrium logic satisfies epistemic splitting"):
  with members:
    - "splitting epistemic logic programs"
    - "a splitting set theorem for epistemic specifications"

Connected through hyperedge HE-7 (induced by source paper "splitting epistemic logic programs"):
  with members:
    - "a survey of advances in epistemic logic program solvers"
    - "a splitting set theorem for epistemic specifications"

Connected through hyperedge HE-8 (induced by source paper "a parallel memory efficient epistemic logic program solver harder better faster"):
  with members:
    - "selp a single shot epistemic logic program solver"
    - "a survey of advances in epistemic logic program solvers"
    - "esmodels an epistemic specification solver"

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.AI(Artificial Intelligence)