human: Given a node-centered hypergraph: <hypergraph>, where nodes represent papers and hyperedges represent sets of papers co-cited by a source paper.

Details of the hypergraph:
Center node: "acewiki a natural and expressive semantic wiki"
  Abstract: We present AceWiki, a prototype of a new kind of semantic wiki using the controlled natural language Attempto Controlled English (ACE) for representing its content. ACE is a subset of English with a restricted grammar and a formal semantics. The use of ACE has two important advantages over existing semantic wikis. First, we can improve the usability and achieve a shallow learning curve. Second, ACE is more expressive than the formal languages of existing semantic wikis. Our evaluation shows that people who are not familiar with the formal foundations of the Semantic Web are able to deal with AceWiki after a very short learning phase and without the help of an expert.

Connected through hyperedge HE-1 (induced by source paper "a brief state of the art for ontology authoring"):
  with members:
    - "a principled approach to grammars for controlled natural languages and predictive editors"

Connected through hyperedge HE-2 (induced by source paper "verifiable source code documentation in controlled natural language"):
  with members:
    - "a survey and classification of controlled natural languages"
    - "a multilingual semantic wiki based on attempto controlled english and grammatical framework"
    - "querying source code with natural language"
    - "how controlled english can improve semantic wikis"

Connected through hyperedge HE-3 (induced by source paper "a multilingual semantic wiki based on attempto controlled english and grammatical framework"):
  with members:
    - "a principled approach to grammars for controlled natural languages and predictive editors"
    - "how controlled english can improve semantic wikis"

Connected through hyperedge HE-4 (induced by source paper "a principled approach to grammars for controlled natural languages and predictive editors"):
  with members:
    - "how controlled english can improve semantic wikis"

Connected through hyperedge HE-5 (induced by source paper "how controlled english can improve semantic wikis"):
  with members:
    - "how to evaluate controlled natural languages"
    - "acewiki collaborative ontology management in controlled natural language"

Connected through hyperedge HE-6 (induced by source paper "combining semantic wikis and controlled natural language"):
  with members:
    - "acewiki collaborative ontology management in controlled natural language"

Question: Please tell me which class the center node belongs to. The 40 classes are: cs.NA(Numerical Analysis), cs.MM(Multimedia), cs.LO(Logic in Computer Science), cs.CY(Computers and Society), cs.CR(Cryptography and Security), cs.DC(Distributed, Parallel, and Cluster Computing), cs.HC(Human-Computer Interaction), cs.CE(Computational Engineering, Finance, and Science), cs.NI(Networking and Internet Architecture), cs.CC(Computational Complexity), cs.AI(Artificial Intelligence), cs.MA(Multiagent Systems), cs.GL(General Literature), cs.NE(Neural and Evolutionary Computing), cs.SC(Symbolic Computation), cs.AR(Hardware Architecture), cs.CV(Computer Vision and Pattern Recognition), cs.GR(Graphics), cs.ET(Emerging Technologies), cs.SY(Systems and Control), cs.CG(Computational Geometry), cs.OH(Other Computer Science), cs.PL(Programming Languages), cs.SE(Software Engineering), cs.LG(Machine Learning), cs.SD(Sound), cs.SI(Social and Information Networks), cs.RO(Robotics), cs.IT(Information Theory), cs.PF(Performance), cs.CL(Computation and Language), cs.IR(Information Retrieval), cs.MS(Mathematical Software), cs.FL(Formal Languages and Automata Theory), cs.DS(Data Structures and Algorithms), cs.OS(Operating Systems), cs.GT(Computer Science and Game Theory), cs.DB(Databases), cs.DL(Digital Libraries), cs.DM(Discrete Mathematics). Directly output the class name.

gpt: cs.HC(Human-Computer Interaction)