human: Given a hyperedge-centered hypergraph: <hypergraph>, where the center hyperedge is induced by one source paper and its member nodes are the cited papers.

Details of the hypergraph:
Center hyperedge (induced by source paper "proportionally representative participatory budgeting with ordinal preferences"):
  Abstract: Participatory budgeting (PB) is a democratic paradigm whereby voters decide on which projects to fund. We consider PB in which voters may be asymmetric, and they report ordinal preferences over projects. We propose proportional representation axioms for the setting and clarify how they fit into other preference aggregation settings. As a result of our study, we also discover a new solution concept that is stronger than proportional justified representation (PJR) for approval-based multi-winner voting.

Includes members:
  Member "a framework for approval based budgeting methods":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "who is in your top three optimizing learning in elections with many candidates")
  Member "fair allocation of indivisible public goods":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "participatory budgeting models and approaches")
  Member "the condorcet principle for multiwinner elections from shortlisting to proportionality":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "unifying ensemble methods for q learning via social choice theory")
  Member "proportionally representative participatory budgeting axioms and algorithms":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "participatory budgeting models and approaches")
  Member "fair mixing the case of dichotomous preferences":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "participatory budgeting models and approaches")
  Member "rank maximal equal contribution a probabilistic social choice function":
    also connected through other hyperedges:
      (none)
  Member "the expanding approvals rule improving proportional representation and monotonicity":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "approximately stable committee selection")
  Member "the core of the participatory budgeting problem":
    also connected through other hyperedges:
      - Hyperedge HE-7 (induced by source paper "participatory budgeting models and approaches")

Question: Please tell me which class the source paper 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)