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: "inseparability and conservative extensions of description logic ontologies a survey"
  Abstract: The question whether an ontology can safely be replaced by another, possibly simpler, one is fundamental for many ontology engineering and maintenance tasks. It underpins, for example, ontology versioning, ontology modularization, forgetting, and knowledge exchange. What ‘safe replacement’ means depends on the intended application of the ontology. If, for example, it is used to query data, then the answers to any relevant ontology-mediated query should be the same over any relevant data set; if, in contrast, the ontology is used for conceptual reasoning, then the entailed subsumptions between concept expressions should coincide. This gives rise to different notions of ontology inseparability such as query inseparability and concept inseparability, which generalize corresponding notions of conservative extensions. In this chapter, we survey results on various notions of inseparability in the context of description logic ontologies, discussing their applications, useful model-theoretic characterizations, algorithms for determining whether two ontologies are inseparable (and, sometimes, for computing the difference between them if they are not), and the computational complexity of this problem.

Connected through hyperedge HE-1 (induced by source paper "query inseparability for alc ontologies"):
  with members:
    - "conservative extensions in guarded and two variable fragments"
    - "optimizing sparql query answering over owl ontologies"
    - "acyclicity notions for existential rules and their application to query answering in ontologies"
    - "ontology based data access a study through disjunctive datalog csp and mmsnp"
    - "exchanging owl 2 ql knowledge bases"
    - "the logical difference for the lightweight description logic el"
    - "foundations for uniform interpolation and forgetting in expressive description logics"
    - "semantical characterizations and complexity of equivalences in answer set programming"

Connected through hyperedge HE-2 (induced by source paper "the data complexity of ontology mediated queries with closed predicates"):
  with members:
    - "a dichotomy theorem for nonuniform csps"
    - "dichotomies in ontology mediated querying with the guarded fragment"
    - "the data complexity of description logic ontologies"
    - "an algebraic hardness criterion for surjective constraint satisfaction"
    - "ontology based data access a study through disjunctive datalog csp and mmsnp"
    - "the complexity of surjective homomorphism problems a survey"
    - "the dl lite family and relations"

Connected through hyperedge HE-3 (induced by source paper "conservative extensions in guarded and two variable fragments"):
  with members:
    - "querying the guarded fragment"
    - "foundations for uniform interpolation and forgetting in expressive description logics"

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)