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: "from social simulation to integrative system design"
  Abstract: The purpose of this White Paper of the EU Support Action “Visioneer” (see www.visioneer.ethz.ch) is to address the following goals: #R##N##R##N#1.#R##N##R##N#Develop strategies to build up social simulation capacities.#R##N##R##N##R##N##R##N##R##N#2.#R##N##R##N#Suggest ways to build up an “artificial societies” community that aims at simulating real and alternative societies by means of supercomputers, grid or cloud computing.#R##N##R##N##R##N##R##N##R##N#3.#R##N##R##N#Derive proposals to establish centers for integrative systems design.

Connected through hyperedge HE-1 (induced by source paper "how to create an innovation accelerator"):
  with members:
    - "from social data mining to forecasting socio economic crises"
    - "citing and reading behaviours in high energy physics how a community stopped worrying about journals and learned to love repositories"
    - "visual conceptualizations and models of science"
    - "maps on the basis of the arts humanities citation index the journals leonardo and art journal versus digital humanities as a topic"
    - "accelerating the pace of discovery by changing the peer review algorithm"

Connected through hyperedge HE-2 (induced by source paper "from social data mining to forecasting socio economic crises"):
  with members:
    - "how to create an innovation accelerator"
    - "the power of convex relaxation near optimal matrix completion"

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)