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: "ecosystem a characteristic of crowdsourced environments"
  Abstract: The phenomenal success of certain crowdsourced online platforms, such as Wikipedia, is accredited to their ability to tap the crowd's potential to collaboratively build knowledge. While it is well known that the crowd's collective wisdom surpasses the cumulative individual expertise, little is understood on the dynamics of knowledge building in a crowdsourced environment. A proper understanding of the dynamics of knowledge building in a crowdsourced environment would enable one in the better designing of such environments to solicit knowledge from the crowd. Our experiment on crowdsourced systems based on annotations shows that an important reason for the rapid knowledge building in such environments is due to variance in expertise. First, we used as our test bed, a customized Crowdsourced Annotation System (CAS) which provides a group of users the facility to annotate a given document while trying to understand it. Our results showed the presence of different genres of proficiency amongst the users of an annotation system. We observed that the ecosystem in crowdsourced annotation system comprised of mainly four categories of contributors, namely: Probers, Solvers, Articulators and Explorers. We inferred from our experiment that the knowledge garnering mainly happens due to the synergetic interaction across these categories. Further, we conducted an analysis on the dataset of Wikipedia and Stack Overflow and noticed the ecosystem presence in these portals as well. From this study, we claim that the ecosystem is a universal characteristic of all crowdsourced portals.

Connected through hyperedge HE-1 (induced by source paper "investigating ortega hypothesis in q a portals an analysis of stackoverflow"):
  with members:
    - "skillset distribution for accelerated knowledge building in crowdsourced environments"

Connected through hyperedge HE-2 (induced by source paper "capturing knowledge triggering in collaborative settings"):
  with members:
    - "how does knowledge come by"
    - "skillset distribution for accelerated knowledge building in crowdsourced environments"
    - "the google similarity distance"

Connected through hyperedge HE-3 (induced by source paper "a framework for textbook enhancement and learning using crowd sourced annotations"):
  with members:
    - "engaging with massive online courses"

Connected through hyperedge HE-4 (induced by source paper "skillset distribution for accelerated knowledge building in crowdsourced environments"):
  with members:
    - "engaging with massive online courses"

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)