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: "vhpop versatile heuristic partial order planner"
  Abstract: VHPOP is a partial order causal link (POCL) planner loosely based on UCPOP. It draws from the experience gained in the early to mid 1990's on flaw selection strategies for POCL planning, and combines this with more recent developments in the field of domain independent planning such as distance based heuristics and reachability analysis. We present an adaptation of the additive heuristic for plan space planning, and modify it to account for possible reuse of existing actions in a plan. We also propose a large set of novel flaw selection strategies, and show how these can help us solve more problems than previously possible by POCL planners. VHPOP also supports planning with durative actions by incorporating standard techniques for temporal constraint reasoning. We demonstrate that the same heuristic techniques used to boost the performance of classical POCL planning can be effective in domains with durative actions as well. The result is a versatile heuristic POCL planner competitive with established CSP-based and heuristic state space planners.

Connected through hyperedge HE-1 (induced by source paper "learning and tuning meta heuristics in plan space planning"):
  with members:
    - "new techniques for algorithm portfolio design"
    - "the lama planner guiding cost based anytime planning with landmarks"
    - "the fast downward planning system"
    - "the ff planning system fast plan generation through heuristic search"

Connected through hyperedge HE-2 (induced by source paper "a flexible coupling approach to multi agent planning under incomplete information"):
  with members:
    - "the lama planner guiding cost based anytime planning with landmarks"
    - "the fast downward planning system"
    - "a framework for sequential planning in multi agent settings"
    - "monitoring teams by overhearing a multi agent plan recognition approach"
    - "the ff planning system fast plan generation through heuristic search"
    - "partial order planning with concurrent interacting actions"
    - "towards flexible teamwork"

Connected through hyperedge HE-3 (induced by source paper "an approach to multi agent planning with incomplete information"):
  with members:
    - "the ff planning system fast plan generation through heuristic search"
    - "partial order planning with concurrent interacting actions"
    - "towards flexible teamwork"

Connected through hyperedge HE-4 (induced by source paper "colin planning with continuous linear numeric change"):
  with members:
    - "the lama planner guiding cost based anytime planning with landmarks"
    - "compiling uncertainty away in conformant planning problems with bounded width"
    - "a heuristic search approach to planning with continuous resources in stochastic domains"
    - "modelling mixed discrete continuous domains for planning"
    - "the fast downward planning system"
    - "an approach to temporal planning and scheduling in domains with predictable exogenous events"
    - "the deterministic part of ipc 4 an overview"
    - "sapa a multi objective metric temporal planner"

Connected through hyperedge HE-5 (induced by source paper "engineering a conformant probabilistic planner"):
  with members:
    - "decision theoretic planning with non markovian rewards"
    - "approximate policy iteration with a policy language bias solving relational markov decision processes"
    - "mgpt a probabilistic planner based on heuristic search"
    - "the ff planning system fast plan generation through heuristic search"
    - "on reasonable and forced goal orderings and their use in an agenda driven planning algorithm"
    - "decision theoretic planning structural assumptions and computational leverage"
    - "flaw selection strategies for partial order planning"

Connected through hyperedge HE-6 (induced by source paper "the 3rd international planning competition results and analysis"):
  with members:
    - "sapa a multi objective metric temporal planner"
    - "taming numbers and durations in the model checking integrated planning system"
    - "pddl2 1 an extension to pddl for expressing temporal planning domains"
    - "the metric ff planning system translating ignoring delete lists to numeric state variables"
    - "planning through stochastic local search and temporal action graphs in lpg"
    - "a critical assessment of benchmark comparison in planning"
    - "the ff planning system fast plan generation through heuristic search"

Connected through hyperedge HE-7 (induced by source paper "sapa a multi objective metric temporal planner"):
  with members:
    - "utility elicitation as a classification problem"
    - "pddl2 1 an extension to pddl for expressing temporal planning domains"
    - "the 3rd international planning competition results and analysis"
    - "the ff planning system fast plan generation through heuristic search"
    - "the grt planning system backward heuristic construction in forward state space planning"
    - "efficient implementation of the plan graph in stan"

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)