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: "electronic proceedings in theoretical computer science eptcs preface"
  Abstract: The SYNT workshop aims to bring together researchers interested in the broad area of synthesis of computing systems. The goal is to foster the development of frontier techniques in automating the development of computing system. Contributions of interest include algorithms, complexity and decidability analysis, as well as reproducible heuristics, implemented tools, and experimental evaluation. Application domains include software, hardware, embedded, and cyberphysical systems. Computation models include functional, reactive, hybrid and timed systems. Identifying, formalizing, and evaluating synthesis in particular application domains is encouraged. #R##N#The fourth iteration of the workshop took place in San Francisco, CA, USA. It was co-located with the 27th International Conference on Computer Aided Verification. The workshop included five contributed talks and two invited talks. In addition, it featured a special session about the Syntax-Guided Synthesis Competition (SyGuS) and the SyntComp Synthesis competition.

Connected through hyperedge HE-1 (induced by source paper "performance heuristics for gr 1 synthesis and related algorithms"):
  with members:
    - "spectra a specification language for reactive systems"
    - "the 4th reactive synthesis competition syntcomp 2017 benchmarks participants results"
    - "the first reactive synthesis competition syntcomp 2014"
    - "symbolic bdd and add algorithms for energy games"
    - "proceedings fifth workshop on synthesis"
    - "the 3rd reactive synthesis competition syntcomp 2016 benchmarks participants results"
    - "synthesizing a lego forklift controller in gr 1 a case study"
    - "a multi paradigm language for reactive synthesis"

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.PL(Programming Languages)