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: "towards a precise semantics for object oriented modeling techniques"
  Abstract: In this paper, we demonstrate how a precise semantics of object-oriented modeling techniques can be achieved, and what the possible benefits are. We outline the main modeling techniques used in the SysLab project, sketch, how a precise semantics can be given, and how this semantics can be used during the development process.

Connected through hyperedge HE-1 (induced by source paper "systems views and models of uml"):
  with members:
    - "concurrent timed port automata"
    - "state based service description"
    - "enhancing the syslab system model with state"
    - "a stream based mathematical model for distributed information processing systems the syslab system model"

Connected through hyperedge HE-2 (induced by source paper "system model based definition of modeling language semantics"):
  with members:
    - "system model semantics of class diagrams"
    - "monticore modular development of textual domain specific languages"
    - "theorem proving support in programming language semantics"

Connected through hyperedge HE-3 (induced by source paper "software and system modeling based on a unified formal semantics"):
  with members:
    - "exemplary and complete object interaction descriptions"
    - "state based service description"
    - "enhancing the syslab system model with state"
    - "towards a formalization of the unified modeling language"
    - "a stream based mathematical model for distributed information processing systems the syslab system model"
    - "refinement of information flow architectures"
    - "automata describing object behavior"

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.SE(Software Engineering)