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: "an optimal construction of hanf sentences"
  Abstract: We give the first elementary construction of equivalent formulas in Hanf normal form. The triply exponential upper bound is complemented by a matching lower bound.

Connected through hyperedge HE-1 (induced by source paper "parameterized synthesis for fragments of first order logic over data words"):
  with members:
    - "synthesis of data word transducers"
    - "playing with repetitions in data words using energy games"
    - "bounded synthesis of register transducers"
    - "distributed synthesis for parameterized temporal logics"
    - "playing games in the baire space"
    - "automated synthesis of distributed controllers"
    - "optimal strategy synthesis for request response games"
    - "petri games synthesis of distributed systems with causal memory"

Connected through hyperedge HE-2 (induced by source paper "first order logic with counting at least weak hanf normal forms always exist and can be computed"):
  with members:
    - "answering fo mod queries under updates on bounded degree databases"
    - "answering conjunctive queries under updates"
    - "automatic structures of bounded degree revisited"
    - "first order queries on structures of bounded degree are computable with constant delay"

Connected through hyperedge HE-3 (induced by source paper "preservation and decomposition theorems for bounded degree structures"):
  with members:
    - "algorithmic meta theorems"
    - "homomorphism preservation on quasi wide classes"

Connected through hyperedge HE-4 (induced by source paper "an automaton over data words that captures emso logic"):
  with members:
    - "relating timed and register automata"
    - "an extension of data automata that captures xpath"
    - "temporal logics on words with multiple data values"
    - "ltl with the freeze quantifier and register automata"

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)