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: "making web annotations persistent over time"
  Abstract: As Digital Libraries (DL) become more aligned with the web architecture, their functional components need to be fundamentally rethought in terms of URIs and HTTP. Annotation, a core scholarly activity enabled by many DL solutions, exhibits a clearly unacceptable characteristic when existing models are applied to the web: due to the representations of web resources changing over time, an annotation made about a web resource today may no longer be relevant to the representation that is served from that same resource tomorrow. We assume the existence of archived versions of resources, and combine the temporal features of the emerging Open Annotation data model with the capability offered by the Memento framework that allows seamless navigation from the URI of a resource to archived versions of that resource, and arrive at a solution that provides guarantees regarding the persistence of web annotations over time. More specifically, we provide theoretical solutions and proof-of-concept experimental evaluations for two problems: reconstructing an existing annotation so that the correct archived version is displayed for all resources involved in the annotation, and retrieving all annotations that involve a given archived version of a web resource.

Connected through hyperedge HE-1 (induced by source paper "quantifying orphaned annotations in hypothes is"):
  with members:
    - "resurrecting my revolution using social link neighborhood in bringing context to the disappearing web"
    - "designing the w3c open annotation data model"
    - "losing my revolution how many resources shared on social media have been lost"
    - "open annotations on multimedia web resources"
    - "how much of the web is archived"
    - "the open annotation collaboration oac model"
    - "sharedcanvas a collaborative model for medieval manuscript layout dissemination"
    - "memento time travel for the web"

Connected through hyperedge HE-2 (induced by source paper "designing the w3c open annotation data model"):
  with members:
    - "an http based versioning mechanism for linked data"

Connected through hyperedge HE-3 (induced by source paper "open annotations on multimedia web resources"):
  with members:
    - "the open annotation collaboration oac model"
    - "sharedcanvas a collaborative model for medieval manuscript layout dissemination"
    - "an http based versioning mechanism for linked data"
    - "memento time travel for the web"

Connected through hyperedge HE-4 (induced by source paper "evaluating the sharedcanvas manuscript data model in catchplus"):
  with members:
    - "sharedcanvas a collaborative model for medieval manuscript layout dissemination"
    - "adding escience assets to the data web"

Connected through hyperedge HE-5 (induced by source paper "the open annotation collaboration oac model"):
  with members:
    - "sharedcanvas a collaborative model for medieval manuscript layout dissemination"

Connected through hyperedge HE-6 (induced by source paper "sharedcanvas a collaborative model for medieval manuscript layout dissemination"):
  with members:
    - "adding escience assets to the data web"

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)