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: "Semantic data models"
  Abstract: Semantic data models have emerged from a requirement for more expressive conceptual data models. Current generation data models lack direct support for relationships, data abstraction, inheritance, constraints, unstructured objects, and the dynamic properties of an application. Although the need for data models with richer semantics is widely recognized, no single approach has won general acceptance. This paper describes the generic properties of semantic data models and presents a representative selection of models that have been proposed since the mid-1970s. In addition to explaining the features of the individual models, guidelines are offered for the comparison of models. The paper concludes with a discussion of future directions in the area of conceptual data modeling.

Connected through hyperedge HE-1 (induced by source paper "Semantic Event Model and Its Implication on Situation Detection"):
  with members:
    - "Amit - the situation manager"

Connected through hyperedge HE-2 (induced by source paper "Understanding the term reference model in information systems research: history, literature analysis and explanation"):
  with members:
    - "Extending the Adaptability of Reference Models"

Connected through hyperedge HE-3 (induced by source paper "Uniform comparison of data models using containment modeling"):
  with members:
    - "Interoperability for GIS document management in environmental planning"

Connected through hyperedge HE-4 (induced by source paper "Federated database systems for managing distributed, heterogeneous, and autonomous databases"):
  with members:
    - "Ontology versioning on the semantic web"
    - "Ontology Evolution: Not the Same as Schema Evolution"
    - "Methodology of schema integration for new database applications: a practitioner's approach"
    - "GridVine: An Infrastructure for Peer Information Management"
    - "Piazza: data management infrastructure for semantic web applications"
    - "Query optimization"
    - "Entwurf von Datenbankföderationen"
    - "Estimating data accuracy in a federated database environment"

Connected through hyperedge HE-5 (induced by source paper "Knowledge-based approaches to database design"):
  with members:
    - "Comparing a rule-based approach with a pattern-based approach at different levels of complexity of conceptual data modelling tasks"
    - "Evaluating the quality of entity relationship models"

Connected through hyperedge HE-6 (induced by source paper "Algebraic support for complex objects with arrays, identity, and inheritance"):
  with members:
    - "An Object-Oriented Query Model: An Algebraic Approach With Closure."

Connected through hyperedge HE-7 (induced by source paper "An Abstract Introduction to the Temporal-Hierarchic Data Model (THM)"):
  with members:
    - "Towards multi-level and modular conceptual schema specifications"

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