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 complexity of second best abductive explanations"
  Abstract: Abstract   When looking for a propositional abductive explanation of a given set of manifestations, an ordering between possible solutions is often assumed. While the complexity of computing optimal solutions is already known, in this paper we consider second-best solutions with respect to different orderings, and different definitions of what a second-best solution is: an optimal solution not already found, or a solution that is optimal among the ones not previously found.

Connected through hyperedge HE-1 (induced by source paper "dynamics of belief abduction horn knowledge base and database updates"):
  with members:
    - "comparative study of view update algorithms in rational choice theory"
    - "a new rational algorithm for view updating in relational databases"
    - "an abductive framework for horn knowledge base dynamics"
    - "a rational and efficient algorithm for view revision in databases"
    - "each normal logic program has a 2 valued minimal hypotheses semantics"
    - "admissible and restrained revision"
    - "coherent integration of databases by abductive logic programming"
    - "new polynomial classes for logic based abduction"

Connected through hyperedge HE-2 (induced by source paper "an abductive framework for horn knowledge base dynamics"):
  with members:
    - "comparative study of view update algorithms in rational choice theory"
    - "a new rational algorithm for view updating in relational databases"
    - "the view update problem for indefinite databases"
    - "each normal logic program has a 2 valued minimal hypotheses semantics"
    - "compilability of propositional abduction"
    - "an abductive framework for computing knowledge base updates"
    - "coherent integration of databases by abductive logic programming"
    - "new polynomial classes for logic based abduction"

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.LO(Logic in Computer Science)