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 the acceptability of arguments in preference based argumentation"
  Abstract: Argumentation is a promising model for reasoning with uncertain knowledge. The key concept of acceptability enables to differentiate arguments and counterarguments: The certainty of a proposition can then be evaluated through the most acceptable arguments for that proposition. In this paper, we investigate different complementary points of view: - an acceptability based on the existence of direct counterarguments, - an acceptability based on the existence of defenders. Pursuing previous work on preference-based argumentation principles, we enforce both points of view by taking into account preference orderings for comparing arguments. Our approach is illustrated in the context of reasoning with stratified knowldge bases.

Connected through hyperedge HE-1 (induced by source paper "an implementation empirical evaluation and proposed improvement for bidirectional splitting method for argumentation frameworks under stable semantics"):
  with members:
    - "value based argumentation frameworks"

Connected through hyperedge HE-2 (induced by source paper "an approach to characterize graded entailment of arguments through a label based framework"):
  with members:
    - "a logic programming framework for possibilistic argumentation with vague knowledge"
    - "graduality in argumentation"
    - "value based argumentation frameworks"

Connected through hyperedge HE-3 (induced by source paper "some supplementaries to the counting semantics for abstract argumentation"):
  with members:
    - "attacker and defender counting approach for abstract argumentation"
    - "argument ranking with categoriser function"
    - "graduality in argumentation"

Connected through hyperedge HE-4 (induced by source paper "the diamond system for argumentation preliminary report"):
  with members:
    - "complex optimization in answer set programming"
    - "eclipse from lp to clp"

Connected through hyperedge HE-5 (induced by source paper "graduality in argumentation"):
  with members:
    - "value based argumentation frameworks"

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.AI(Artificial Intelligence)