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: "Structure oriented case retrieval"

Connected through hyperedge HE-1 (induced by source paper "Towards Formalizations in Case-Based Reasoning for Synthesis"):
  with members:
    - "Conceptual Analogy"
    - "Structural Similarity as Guidance in Case-Based Design"
    - "Task-Oriented Knowledge Acquisition and Reasoning for Design Support Systems"

Connected through hyperedge HE-2 (induced by source paper "Systematic Evaluation of Design Decisions in CBR Systems"):
  with members:
    - "MULTISTRATEGY LEARNING IN REACTIVE CONTROL SYSTEMS FOR AUTONOMOUS ROBOTIC NAVIGATION"
    - "Generalizing from Case Studies: A Case Study"
    - "Continuous Case-Based Reasoning"

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: Case_Based