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: "the weighted cfg constraint"
  Abstract: We introduce the weighted CFG constraint and propose a propagation algorithm that enforces domain consistency in $O(n^3|G|)$ time. We show that this algorithm can be decomposed into a set of primitive arithmetic constraints without hindering propagation.

Connected through hyperedge HE-1 (induced by source paper "combining pattern based crfs and weighted context free grammars"):
  with members:
    - "inference algorithms for pattern based crfs on sequence data"
    - "all pairs shortest paths using bridging sets and rectangular matrix multiplication"

Connected through hyperedge HE-2 (induced by source paper "circuit complexity and decompositions of global constraints"):
  with members:
    - "decompositions of all different global cardinality and related constraints"
    - "slide a useful special case of the cardpath constraint"
    - "the complexity of reasoning with global constraints"
    - "decompositions of grammar constraints"
    - "a knowledge compilation map"

Connected through hyperedge HE-3 (induced by source paper "decompositions of all different global cardinality and related constraints"):
  with members:
    - "circuit complexity and decompositions of global constraints"
    - "slide a useful special case of the cardpath constraint"
    - "decompositions of grammar constraints"

Connected through hyperedge HE-4 (induced by source paper "restricted global grammar constraints"):
  with members:
    - "decompositions of grammar constraints"
    - "reformulating global grammar constraints"
    - "fast context free grammar parsing requires fast boolean matrix multiplication"

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)