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: "finding a collective set of items from proportional multirepresentation to group recommendation"
  Abstract: We consider the following problem: There is a set of items (e.g., movies) and a group of agents (e.g., passengers on a plane); each agent has some intrinsic utility for each of the items. Our goal is to pick a set of $K$ items that maximize the total derived utility of all the agents (i.e., in our example we are to pick $K$ movies that we put on the plane's entertainment system). However, the actual utility that an agent derives from a given item is only a fraction of its intrinsic one, and this fraction depends on how the agent ranks the item among the chosen, available, ones. We provide a formal specification of the model and provide concrete examples and settings where it is applicable. We show that the problem is hard in general, but we show a number of tractability results for its natural special cases.

Connected through hyperedge HE-1 (induced by source paper "evaluating approval based multiwinner voting in terms of robustness to noise"):
  with members:
    - "a quantitative analysis of multi winner rules"
    - "consistent approval based multi winner rules"
    - "multiwinner approval rules as apportionment methods"
    - "justified representation in approval based committee voting"
    - "computational aspects of multi winner approval voting"
    - "a maximum likelihood approach for selecting sets of alternatives"
    - "common voting rules as maximum likelihood estimators"

Connected through hyperedge HE-2 (induced by source paper "computing a small agreeable set of indivisible items"):
  with members:
    - "fair division under cardinality constraints"
    - "approximation algorithms for computing maximin share allocations"
    - "approximate maximin shares for groups of agents"
    - "democratic fair allocation of indivisible goods"
    - "assigning a small agreeable set of indivisible items to multiple players"
    - "envy free cake cutting among families"
    - "proportional cake cutting among families"
    - "justified representation in approval based committee voting"

Connected through hyperedge HE-3 (induced by source paper "approval based apportionment"):
  with members:
    - "group fairness in committee selection"
    - "fair allocation of indivisible public goods"
    - "monotonicity axioms in approval based multi winner voting rules"
    - "fair mixing the case of dichotomous preferences"
    - "committees providing ejr can be computed efficiently"
    - "multiwinner approval rules as apportionment methods"
    - "justified representation in approval based committee voting"
    - "computational aspects of multi winner approval voting"

Connected through hyperedge HE-4 (induced by source paper "electing a committee with dominance constraints"):
  with members:
    - "a rule for committee selection with soft diversity constraints"
    - "multiwinner elections with diversity constraints"
    - "multiwinner voting with fairness constraints"
    - "multi attribute proportional representation"
    - "properties of multiwinner voting rules"
    - "on the computation of fully proportional representation"

Connected through hyperedge HE-5 (induced by source paper "what do multiwinner voting rules do an experiment over the two dimensional euclidean domain"):
  with members:
    - "committee scoring rules axiomatic characterization and hierarchy"
    - "consistent approval based multi winner rules"
    - "properties of multiwinner voting rules"
    - "on the computation of fully proportional representation"
    - "cloning in elections finding the possible winners"

Connected through hyperedge HE-6 (induced by source paper "committee scoring rules axiomatic characterization and hierarchy"):
  with members:
    - "what do multiwinner voting rules do an experiment over the two dimensional euclidean domain"
    - "the condorcet principle for multiwinner elections from shortlisting to proportionality"
    - "monotonicity axioms in approval based multi winner voting rules"
    - "multiwinner elections with diversity constraints"
    - "consistent approval based multi winner rules"
    - "multiwinner voting with fairness constraints"
    - "group fairness in multiwinner voting"
    - "robustness among multiwinner voting rules"

Connected through hyperedge HE-7 (induced by source paper "a quantitative analysis of multi winner rules"):
  with members:
    - "what do multiwinner voting rules do an experiment over the two dimensional euclidean domain"
    - "proportionality and the limits of welfarism"
    - "group fairness in committee selection"
    - "fair allocation of indivisible public goods"
    - "the condorcet principle for multiwinner elections from shortlisting to proportionality"
    - "consistent approval based multi winner rules"
    - "robustness among multiwinner voting rules"
    - "what do we elect committees for a voting committee model for multi winner rules"

Connected through hyperedge HE-8 (induced by source paper "flexible representative democracy an introduction with binary issues"):
  with members:
    - "on rational delegations in liquid democracy"
    - "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"
    - "justified representation in approval based committee voting"

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.GT(Computer Science and Game Theory)