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: "adapting cbpp platforms for instructional use"
  Abstract: Commons based peer-production (CBPP) is the de-centralized, net-based approach to the creation and dissemination of information resources. Underlying every CBPP system is a virtual community brought together by an internet tool (such as a web site) and struc- tured by a specific collaboration protocol. In this talk we will argue that the value of such platforms can be leveraged by adapting them for pedagogical purposes. We report on one such recent adaptation. The Noosphere system is a web-based collaboration environment that underlies the popular Planetmath website, a collaboratively written encyclopedia of math- ematics licensed under the GNU Free Documentation License (FDL). Recently, the system was used to host a graduate-level mathematics course at Dalhousie University, in Halifax, Canada. The course con- sisted of regular lectures and assignment problems. The students in the course collaborated on a set of course notes, encapsulating the lec- ture content and giving solutions of assigned problems. The successful outcome of this experiment demonstrated that a dedicated No¨ system is well suited for classroom applications. We argue that this "proof of concept" experience also strongly suggests that every suc- cessful CBPP platform possesses latent pedagogical value. � Supported by Dalhousie's Centre for Learning and Teaching, and N.S.E.R.C., Canada.

Connected through hyperedge HE-1 (induced by source paper "ncore architecture and implementation of a flexible collaborative digital library"):
  with members:
    - "representing contextualized information in the nsdl"
    - "metadata aggregation and automated digital libraries a retrospective on the nsdl experience"
    - "fedora an architecture for complex objects and their relationships"
    - "an information network overlay architecture for the nsdl"

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.DL(Digital Libraries)