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 "CBR for Document Retrieval: The FAllQ Project"):
  Abstract: This paper reports about a project on document retrieval in an industrial setting. The objective is to provide a tool that helps finding documents related to a given query, such as answers in Frequently Asked Questions databases. A CBR approach has been used to develop a running prototypical system which is currently under practical evaluation.

Includes members:
  Member "Case Retrieval Nets: Basic Ideas and Extensions":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "Preparing Case Retrieval Nets for Distributed Processing")
  Member "CBR on Semi-structured Documents: The ExperienceBook and the FAllQ Project":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "Case Retrieval Nets: Basic Ideas and Extensions")
  Member "Applying Case Retrieval Nets to Diagnostic Tasks in Technical Domains":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "Preparing Case Retrieval Nets for Distributed Processing")
  Member "Justification Structures for Document Reuse":
    also connected through other hyperedges:
      (none)

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: Case_Based