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: "mutualistic relationships in service oriented communities and fractal social organizations"
  Abstract: In this paper we consider two social organizations -- service-oriented communities and fractal organizations -- and discuss how their main characteristics provide an answer to several shortcomings of traditional organizations. In particular, we highlight their ability to tap into the vast basins of "social energy" of our societies. This is done through the establishing of mutualistic relationships among the organizational components. The paper also introduces a mathematical model of said mutualistic processes as well as its translation in terms of semantic service description and matching. Preliminary investigations of the resilience of fractal social organizations are reported. Simulations show that fractal organizations outperform non-fractal organizations and are able to quickly recover from disruptions and changes characterizing dynamic environments.

Connected through hyperedge HE-1 (induced by source paper "fractal social organization as a foundation to pervasive social computing services"):
  with members:
    - "fractally organized connectionist networks conjectures and preliminary results"
    - "on the requirements of new software development"
    - "on environments as systemic exoskeletons crosscutting optimizers and antifragility enablers"
    - "models and representations for fractal social organizations"
    - "on resilient behaviors in computational systems and environments"
    - "how resilient are our societies analyses models and preliminary results"
    - "service oriented communities visions and contributions towards social organizations"
    - "on the constituent attributes of software and organizational resilience"

Connected through hyperedge HE-2 (induced by source paper "towards a smarter organization for a self servicing society"):
  with members:
    - "tapping into the wells of social energy a case study based on falls identification"
    - "how resilient are our societies analyses models and preliminary results"
    - "service oriented communities visions and contributions towards social organizations"

Connected through hyperedge HE-3 (induced by source paper "how resilient are our societies analyses models and preliminary results"):
  with members:
    - "on resilient behaviors in computational systems and environments"
    - "a framework for trustworthiness assessment based on fidelity in cyber and physical domains"
    - "service oriented communities visions and contributions towards social organizations"
    - "antifragility elasticity resilience machine learning models and algorithms for open system fidelity"
    - "reflections on organization emergence and control in sociotechnical systems"
    - "the missing ones key ingredients towards effective ambient assisted living systems"

Connected through hyperedge HE-4 (induced by source paper "fractally organized connectionist networks conjectures and preliminary results"):
  with members:
    - "how resilient are our societies analyses models and preliminary results"
    - "service oriented communities visions and contributions towards social organizations"
    - "systems resilience and organization analogies and points of contact with hierarchy theory"
    - "behavior organization substance three gestalts of general systems theory"

Connected through hyperedge HE-5 (induced by source paper "tapping into the wells of social energy a case study based on falls identification"):
  with members:
    - "how resilient are our societies analyses models and preliminary results"
    - "service oriented communities visions and contributions towards social organizations"
    - "quality indicators for collective systems resilience"
    - "flexible development of dependability services an experience derived from energy automation systems"

Connected through hyperedge HE-6 (induced by source paper "systems resilience and organization analogies and points of contact with hierarchy theory"):
  with members:
    - "towards a smarter organization for a self servicing society"
    - "a framework for trustworthiness assessment based on fidelity in cyber and physical domains"
    - "on the behavioral interpretation of system environment fit and auto resilience"
    - "quality indicators for collective systems resilience"
    - "antifragility elasticity resilience machine learning models and algorithms for open system fidelity"
    - "behavior organization substance three gestalts of general systems theory"
    - "application layer fault tolerance protocols"

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)