human: Given a node-centered hypergraph: <hypergraph>, where nodes represent papers and hyperedges represent groups of papers sharing a common citing paper.

Details of the hypergraph:
Center node: "A Survey of Theory and Methods of Invariant Item Ordering"
  Abstract: This work was initiated while Junker was visiting the University of Utrecht with the support of a Carnegie Mellon University Faculty Development Grant, and the generous hospitality of the Social Sciences Faculty, University of Utrecht. Additional support was provided by the Office of Naval Research, Cognitive Sciences Division, Grant N00014-87-K-0277 and the National Institute of Mental Health, Training Grant MH15758.

Connected through hyperedge HE-1 (induced by source paper "Some remarks on Scheiblechner's treatment of ISOP models."):
  with members:
    (none)

Question: Please tell me which class the center node belongs to. The 7 classes are: Neural_Networks, Reinforcement_Learning, Probabilistic_Methods, Theory, Genetic_Algorithms, Case_Based, Rule_Learning. Directly output the class name.

gpt: Neural_Networks