human: Given a node-centered hypergraph: <hypergraph>, where nodes represent authors and hyperedges represent groups of authors who co-authored the same paper.

Details of the hypergraph:
Center node: "Natural Language Dialogue For Managing An On-Line Calendar"
  Abstract: {}

Connected through hyperedge HE-1 (induced by source paper "GUS, a frame-driven dialog system"):
  with members:
    - "An overview of KRL, a Knowledge Representation Language"

Connected through hyperedge HE-2 (induced by source paper "The role of time in information processing: a survey"):
  with members:
    - "Synchronization and storage models for multimedia objects"

Question: Please tell me which research area the center author belongs to. The 4 classes are: Computer science, Mathematics, Engineering, Economics, Psychology, Business. Directly output the class name.

gpt: Computer science