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: "a complete classification of tractability in rcc 5"
  Abstract: We investigate the computational properties of the spatial algebra RCC-5 which is a restricted version of the RCC framework for spatial reasoning. The satisfiability problem for RCC-5 is known to be NP-complete but not much is known about its approximately four billion subclasses. We provide a complete classification of satisfiability for all these subclasses into polynomial and NP-complete respectively. In the process, we identify all maximal tractable subalgebras which are four in total.

Connected through hyperedge HE-1 (induced by source paper "a survey of qualitative spatial and temporal calculi algebraic and computational properties"):
  with members:
    - "on redundant topological constraints"
    - "realizing rcc8 networks using convex regions"
    - "algebraic properties of qualitative spatio temporal calculi"
    - "from quantitative spatial operator to qualitative spatial relation using constructive solid geometry logic rules and optimized 9 im model a semantic based approach"
    - "spatial logics with connectedness predicates"
    - "reasoning about cardinal directions between extended objects"
    - "the complexity of reasoning about spatial congruence"

Connected through hyperedge HE-2 (induced by source paper "on redundant topological constraints"):
  with members:
    - "on the decidability of connectedness constraints in 2d and 3d euclidean spaces"
    - "reasoning about cardinal directions between extended objects"
    - "redundancy in logic i cnf propositional formulae"
    - "removing propagation redundant constraints in redundant modeling"

Connected through hyperedge HE-3 (induced by source paper "algebraic properties of qualitative spatio temporal calculi"):
  with members:
    - "spatial logics with connectedness predicates"

Connected through hyperedge HE-4 (induced by source paper "complexity classification in infinite domain constraint satisfaction"):
  with members:
    - "absorbing subalgebras cyclic terms and the constraint satisfaction problem"
    - "on the scope of the universal algebraic approach to constraint satisfaction"
    - "tractable set constraints"
    - "datalog and constraint satisfaction with infinite templates"
    - "a fast algorithm and datalog inexpressibility for temporal reasoning"
    - "cores of countably categorical structures"
    - "a characterisation of first order constraint satisfaction problems"
    - "linear datalog and bounded path duality of relational structures"

Connected through hyperedge HE-5 (induced by source paper "peek arc consistency"):
  with members:
    - "datalog and constraint satisfaction with infinite templates"
    - "the complexity of reasoning about spatial congruence"

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)