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: "query answering with transitive and linear ordered data"
  Abstract: We consider entailment problems involving powerful constraint languages such as guarded existential rules, in which additional semantic restrictions are put on a set of distinguished relations. We consider restricting a relation to be transitive, restricting a relation to be the transitive closure of another relation, and restricting a relation to be a linear order. We give some natural generalizations of guardedness that allow inference to be decidable in each case, and isolate the complexity of the corresponding decision problems. Finally we show that slight changes in our conditions lead to undecidability.

Connected through hyperedge HE-1 (induced by source paper "finite satisfiability of unary negation fragment with transitivity"):
  with members:
    - "the fluted fragment with transitivity"
    - "unary negation fragment with equivalence relations has the finite model property"
    - "finite query answering in expressive description logics with transitive roles"
    - "the finite satisfiability problem for two variable first order logic with one transitive relation is decidable"
    - "finite satisfiability of the two variable guarded fragment with transitive guards and related variants"

Connected through hyperedge HE-2 (induced by source paper "unary negation fragment with equivalence relations has the finite model property"):
  with members:
    - "the finite satisfiability problem for two variable first order logic with one transitive relation is decidable"
    - "finite satisfiability of the two variable guarded fragment with transitive guards and related variants"

Connected through hyperedge HE-3 (induced by source paper "containment for rule based ontology mediated queries"):
  with members:
    - "query rewriting and optimization for ontological databases"
    - "querying the guarded fragment"
    - "ontology based data access a study through disjunctive datalog csp and mmsnp"
    - "relational transducers for declarative networking"

Connected through hyperedge HE-4 (induced by source paper "finite satisfiability of the two variable guarded fragment with transitive guards and related variants"):
  with members:
    - "order invariance of two variable logic is decidable"
    - "combining existential rules and transitivity next steps"
    - "two variable logic with two order relations"
    - "satisfiability vs finite satisfiability in elementary modal logics"
    - "finite satisability for guarded fixpoint logic"
    - "complexity of the guarded two variable fragment with counting quantifiers"
    - "complexity results and practical algorithms for logics in knowledge representation"

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.DB(Databases)