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: "efficient open world reasoning for planning"
  Abstract: We consider the problem of reasoning and planning with incomplete knowledge#N#and deterministic actions. We introduce a knowledge representation scheme#N#called PSIPLAN that can effectively represent incompleteness of an agent's#N#knowledge while allowing for sound, complete and tractable entailment in#N#domains where the set of all objects is either unknown or infinite. We present#N#a procedure for state update resulting from taking an action in PSIPLAN that is#N#correct, complete and has only polynomial complexity. State update is performed#N#without considering the set of all possible worlds corresponding to the#N#knowledge state. As a result, planning with PSIPLAN is done without direct#N#manipulation of possible worlds. PSIPLAN representation underlies the PSIPOP#N#planning algorithm that handles quantified goals with or without exceptions#N#that no other domain independent planner has been shown to achieve. PSIPLAN has#N#been implemented in Common Lisp and used in an application on planning in a#N#collaborative interface.

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)