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: "a web based ide for idp"
  Abstract: IDP is a knowledge base system based on first order logic. It is finding its way to a larger public but is still facing practical challenges. Adoption of new languages requires a newcomer-friendly way for users to interact with it. Both an online presence to try to convince potential users to download the system and offline availability to develop larger applications are essential. We developed an IDE which can serve both purposes through the use of web technology. It enables us to provide the user with a modern IDE with relatively little effort.

Connected through hyperedge HE-1 (induced by source paper "debugging non ground asp programs technique and graphical tools"):
  with members:
    - "combining answer set programming and domain heuristics for solving hard industrial problems application paper"
    - "anytime answer set optimization via unsatisfiable core shrinking"
    - "justifying answer sets using argumentation"
    - "optimizing phylogenetic supertrees using answer set programming"
    - "generating explanations for biomedical queries"
    - "the third open answer set programming competition"
    - "unit testing in aspide"
    - "catching the ouroboros on debugging non ground answer set programs"

Connected through hyperedge HE-2 (induced by source paper "web star a visual web based ide for a story comprehension system"):
  with members:
    - "an online development environment for answer set programming"
    - "programming in logic without logic programming"
    - "the amazing mysteries of the gutter drawing inferences between panels in comic book narratives"
    - "swish swi prolog for sharing"
    - "prospects for in depth story understanding by computer"

Connected through hyperedge HE-3 (induced by source paper "onlinesparc a programming environment for answer set programming"):
  with members:
    - "programming in logic without logic programming"
    - "visualising interactive inferences with idpd3"
    - "kara a system for visualising and visual editing of interpretations for answer set programs"
    - "the sealion has landed an ide for answer set programming preliminary report"

Connected through hyperedge HE-4 (induced by source paper "an online development environment for answer set programming"):
  with members:
    - "programming in logic without logic programming"
    - "visualising interactive inferences with idpd3"
    - "kara a system for visualising and visual editing of interpretations for answer set programs"
    - "the sealion has landed an ide for answer set programming preliminary report"

Connected through hyperedge HE-5 (induced by source paper "web star towards a visual web based ide for a story comprehension system"):
  with members:
    - "swish swi prolog for sharing"

Connected through hyperedge HE-6 (induced by source paper "loide a web based ide for logic programming preliminary technical report"):
  with members:
    - "kara a system for visualising and visual editing of interpretations for answer set programs"

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.PL(Programming Languages)