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: "benchmarks for parity games"
  Abstract: We propose a benchmark suite for parity games that includes all benchmarks that have been used in the literature, and make it available online. We give an overview of the parity games, including a description of how they have been generated. We also describe structural properties of parity games, and using these properties we show that our benchmarks are representative. With this work we provide a starting point for further experimentation with parity games.

Connected through hyperedge HE-1 (induced by source paper "simple fixpoint iteration to solve parity games"):
  with members:
    - "solving parity games using an automata based algorithm"
    - "a comparison of bdd based parity game solvers"
    - "oink an implementation and evaluation of modern parity game solvers"
    - "a parity game tale of two counters"
    - "attracting tangles to solve parity games"
    - "succinct progress measures for solving parity games"
    - "the fixpoint iteration algorithm for parity games"

Connected through hyperedge HE-2 (induced by source paper "oink an implementation and evaluation of modern parity game solvers"):
  with members:
    - "efficient parallel strategy improvement for parity games"
    - "an ordered approach to solving parity games in quasi polynomial time and quasi linear space"
    - "succinct progress measures for solving parity games"
    - "a delayed promotion policy for parity games"
    - "improvement in small progress measures"
    - "generating and solving symbolic parity games"
    - "zielonka s recursive algorithm dull weak and solitaire games and tighter bounds"
    - "non oblivious strategy improvement"

Connected through hyperedge HE-3 (induced by source paper "a comparison of bdd based parity game solvers"):
  with members:
    - "solving parity games using an automata based algorithm"
    - "oink an implementation and evaluation of modern parity game solvers"
    - "an ordered approach to solving parity games in quasi polynomial time and quasi linear space"
    - "succinct progress measures for solving parity games"
    - "a delayed promotion policy for parity games"
    - "the fixpoint iteration algorithm for parity games"
    - "zielonka s recursive algorithm dull weak and solitaire games and tighter bounds"
    - "alpaga a tool for solving parity games with imperfect information"

Connected through hyperedge HE-4 (induced by source paper "attracting tangles to solve parity games"):
  with members:
    - "oink an implementation and evaluation of modern parity game solvers"
    - "robust exponential worst cases for divide et impera algorithms for parity games"
    - "efficient parallel strategy improvement for parity games"
    - "an ordered approach to solving parity games in quasi polynomial time and quasi linear space"
    - "a delayed promotion policy for parity games"
    - "improvement in small progress measures"
    - "non oblivious strategy improvement"

Connected through hyperedge HE-5 (induced by source paper "efficient parallel strategy improvement for parity games"):
  with members:
    - "the complexity of all switches strategy improvement"
    - "an exponential lower bound for the latest deterministic strategy iteration algorithms"
    - "strategy iteration using non deterministic strategies for solving parity games"

Connected through hyperedge HE-6 (induced by source paper "winning cores in parity games"):
  with members:
    - "fatal attractors in parity games building blocks for partial solvers"
    - "graph operations on parity games and polynomial time algorithms"
    - "linear time algorithm for weak parity games"

Connected through hyperedge HE-7 (induced by source paper "partial solvers for parity games effective polynomial time composition"):
  with members:
    - "fatal attractors in parity games building blocks for partial solvers"
    - "time and parallelizability results for parity games with bounded tree and dag width"
    - "the rabin index of parity games"

Connected through hyperedge HE-8 (induced by source paper "parity game reductions"):
  with members:
    - "an o m log n algorithm for stuttering equivalence and branching bisimulation"
    - "branching bisimilarity checking for prs"
    - "advanced automata minimization"

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)