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: "on rational delegations in liquid democracy"
  Abstract: Liquid democracy is a proxy voting method where proxies are delegable. We propose and study a game-theoretic model of liquid democracy to address the following question: when is it rational for a voter to delegate her vote? We study the existence of pure-strategy Nash equilibria in this model, and how group accuracy is affected by them. We complement these results by means of simulations to study the effect of network structures on group's accuracy, and various aspects of the patterns of delegations that emerge in this type of interaction.

Connected through hyperedge HE-1 (induced by source paper "the convergence of iterative delegations in liquid democracy in a social network"):
  with members:
    - "flexible representative democracy an introduction with binary issues"
    - "the fluid mechanics of liquid democracy"
    - "binary voting with delegable proxy an analysis of liquid democracy"

Connected through hyperedge HE-2 (induced by source paper "flexible representative democracy an introduction with binary issues"):
  with members:
    - "a mathematical model for optimal decisions in a representative democracy"
    - "the conference paper assignment problem using order weighted averages to assign indivisible goods"
    - "binary voting with delegable proxy an analysis of liquid democracy"
    - "proxy voting for better outcomes"
    - "what do we elect committees for a voting committee model for multi winner rules"
    - "finding a collective set of items from proportional multirepresentation to group recommendation"
    - "justified representation in approval based committee voting"

Connected through hyperedge HE-3 (induced by source paper "the convergence of iterative delegations in liquid democracy"):
  with members:
    - "binary voting with delegable proxy an analysis of liquid democracy"
    - "proxy voting for better outcomes"
    - "plurality voting under uncertainty"
    - "new results on equilibria in strategic candidacy"
    - "on the computation of fully proportional representation"

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.MA(Multiagent Systems)