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: "collective intelligence in citizen science a study of performers and talkers"
  Abstract: Ramine Tinati, Elena Simperl, Markus Luczak-Roesch, Max Van Kleek, Nigel Shadbolt, University ofSouthampton1. INTRODUCTIONOnline citizen science can be seen as a form of collective intelligence Levy [1997] and Woolley et al.´[2010] in which the wisdom of the crowd is applied to the Web to advance scientiﬁc knowledge [Prestop-nik and Crowston 2012] Thus far, online citizen science projects [Bonney et al. 2009] have appliedmillions of volunteers to solving problems in a wide array of scientiﬁc domains, ranging from the clas-siﬁcation of galaxies [Fortson et al. 2011] to the completion of protein folding networks [Khatib et al.2011].Central to many of these projects are online messaging or discussion facilities designed to allowvolunteers to ask one another questions and advice. Such facilities have in many cases yielded sub-stantial, dedicated self-sustaining online communities. In this paper, we examine participation in suchcommunities; speciﬁcally, whether participation in online discussion inﬂuences task completion withinand across 10 distinct projects of a shared citizen science platform, the Zooniverse

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.SI(Social and Information Networks)