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: "embedding non ground logic programs into autoepistemic logic for knowledge base combination"
  Abstract: In the context of the Semantic Web, several approaches to the combination of ontologies, given in terms of theories of classical first-order logic and rule bases, have been proposed. They either cast rules into classical logic or limit the interaction between rules and ontologies. Autoepistemic logic (AEL) is an attractive formalism which allows to overcome these limitations, by serving as a uniform host language to embed ontologies and nonmonotonic logic programs into it. For the latter, so far only the propositional setting has been considered. In this paper, we present three embeddings of normal and three embeddings of disjunctive non-ground logic programs under the stable model semantics into first-order AEL. While the embeddings all correspond with respect to objective ground atoms, differences arise when considering non-atomic formulas and combinations with first-order theories. We compare the embeddings with respect to stable expansions and autoepistemic consequences, considering the embeddings by themselves, as well as combinations with classical theories. Our results reveal differences and correspondences of the embeddings and provide useful guidance in the choice of a particular embedding for knowledge combination.

Connected through hyperedge HE-1 (induced by source paper "embedding description logic programs into default logic"):
  with members:
    - "loop formulas for description logic programs"
    - "answer sets for logic programs with arbitrary abstract constraint atoms"
    - "weight constraints as nested expressions"
    - "stable models and an alternative logic programming paradigm"

Connected through hyperedge HE-2 (induced by source paper "loop formulas for description logic programs"):
  with members:
    - "stable models and an alternative logic programming paradigm"

Connected through hyperedge HE-3 (induced by source paper "characterising equilibrium logic and nested logic programs reductions and complexity1 2"):
  with members:
    - "propositional theories are strongly equivalent to logic programs"
    - "a common view on strong uniform and other notions of equivalence in answer set programming"
    - "the dlv system for knowledge representation and reasoning"
    - "semantical characterizations and complexity of equivalences in answer set programming"
    - "tight logic programs"
    - "strong equivalence made easy nested expressions and weight constraints"
    - "characterization of strongly equivalent logic programs in intermediate logics"
    - "a polynomial translation of logic programs with nested expressions into disjunctive logic programs preliminary report"

Connected through hyperedge HE-4 (induced by source paper "guarded hybrid knowledge bases"):
  with members:
    - "open answer set programming with guarded programs"

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)