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: "how controlled english can improve semantic wikis"
  Abstract: The motivation of semantic wikis is to make acquisition, maintenance, and mining of formal knowledge simpler, faster, and more flexible. However, most existing semantic wikis have a very technical interface and are restricted to a relatively low level of expressivity. In this paper, we explain how AceWiki uses controlled English - concretely Attempto Controlled English (ACE) - to provide a natural and intuitive interface while supporting a high degree of expressivity. We introduce recent improvements of the AceWiki system and user studies that indicate that AceWiki is usable and useful.

Connected through hyperedge HE-1 (induced by source paper "a survey and classification of controlled natural languages"):
  with members:
    - "fully automatic multi language translation with a catalogue of phrases successful employment for the swiss avalanche bulletin"
    - "verifiable source code documentation in controlled natural language"
    - "broadening the scope of nanopublications"
    - "a multilingual semantic wiki based on attempto controlled english and grammatical framework"

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"
    - "acewiki a natural and expressive semantic wiki"

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"
    - "acewiki a natural and expressive semantic wiki"

Connected through hyperedge HE-4 (induced by source paper "a principled approach to grammars for controlled natural languages and predictive editors"):
  with members:
    - "acewiki a natural and expressive semantic wiki"

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)