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 reference architecture for integrating the industrial internet of things in the industry 4 0"
  Abstract: This paper presents a new reference architecture model for the integration of these systems and technologies. The reference architecture model is based on grouping of future and present techniques and presenting the design process through a new hierarchical framework and a new cascading model. With the application of the grounded theory, the hierarchical framework and the cascading model detail a new process for creating a taxonomy of categories and grouping of concepts into integration design. The new design process is tested and versified with an empirical review of Industry 4.0 frameworks and results with a new 5 levels reference architecture step by step model for the integration of these related systems and technologies (Industrial Internet of Things, Cyber Physical Systems, and Industry 4.0).

Connected through hyperedge HE-1 (induced by source paper "future developments in standardisation of cyber risk in the internet of things iot"):
  with members:
    - "definition of internet of things iot cyber risk discussion on a transformation roadmap for standardisation of regulations risk maturity strategy design and impact assessment"
    - "sonification in security operations centres what do security practitioners think"
    - "if you can t understand it you can t properly assess it the reality of assessing security risks in internet of things systems"
    - "economic impact of iot cyber risk analysing past and present to predict the future developments in iot risk analysis and iot cyber insurance"
    - "future developments in cyber risk assessment for the internet of things"
    - "security risk assessment in internet of things systems"
    - "a cyber physical system based approach for industrial automation systems"

Connected through hyperedge HE-2 (induced by source paper "definition of internet of things iot cyber risk discussion on a transformation roadmap for standardisation of regulations risk maturity strategy design and impact assessment"):
  with members:
    - "future developments in standardisation of cyber risk in the internet of things iot"
    - "sonification in security operations centres what do security practitioners think"
    - "economic impact of iot cyber risk analysing past and present to predict the future developments in iot risk analysis and iot cyber insurance"
    - "future developments in cyber risk assessment for the internet of things"
    - "a review of internet of things architecture technologies and analysis smartphone based attacks against 3d printers"

Connected through hyperedge HE-3 (induced by source paper "the industrial internet of things in the industry 4 0 supply chains literature review and future trends"):
  with members:
    - "future developments in standardisation of cyber risk in the internet of things iot"
    - "sonification in security operations centres what do security practitioners think"
    - "security risk assessment in internet of things systems"

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.CY(Computers and Society)