human: Given a hyperedge-centered hypergraph: <hypergraph>, where the center hyperedge groups papers that share a common citing paper.

Details of the hypergraph:
Center hyperedge (induced by source paper "Dlab: A Declarative Language Bias Formalism"):
  Abstract: We describe the principles and functionalities of Dlab (Declarative LAnguage Bias). Dlab can be used in inductive learning systems to define syntactically and traverse efficiently finite subspaces of first order clausal logic, be it a set of propositional formulae, association rules, Horn clauses, or full clauses. A Prolog implementation of Dlab is available by ftp access. Keywords: declarative language bias, concept learning, knowledge dis covery

Includes members:
  Member "Evaluation and Selection of Biases in Machine Learning":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "Evolution-based Discovery of Hierarchical Behaviors")
  Member "Inductive Database Design":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "Applications of a logical discovery engine")

Question: Please tell me which class the citing paper (i.e., the source paper of the center hyperedge) 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: Rule_Learning