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: "memento time travel for the web"
  Abstract: The Web is ephemeral. Many resources have representations that change over time, and many of those representations are lost forever. A lucky few manage to reappear as archived resources that carry their own URIs. For example, some content management systems maintain version pages that reect a frozen prior state of their changing resources. Archives recurrently crawl the web to obtain the actual representation of resources, and subsequently make those available via special-purpose archived resources. In both cases, the archival copies have URIs that are protocolwise disconnected from the URI of the resource of which they represent a prior state. Indeed, the lack of temporal capabilities in the most common Web protocol, HTTP, prevents getting to an archived resource on the basis of the URI of its original. This turns accessing archived resources into a signicant discovery challenge for both human and software agents, which typically involves following a multitude of links from the original to the archival resource, or of searching archives for the original URI. This paper proposes the protocol-based Memento solution to address this problem, and describes a proof-of-concept experiment that includes major servers of archival content, including Wikipedia and the Internet Archive. The Memento solution is based on existing HTTP capabilities applied in a novel way to add the temporal dimension. The result is a framework in which archived resources can seamlessly be reached via the URI of their original: protocol-based time travel for the Web.

Connected through hyperedge HE-1 (induced by source paper "archive assisted archival fixity verification framework"):
  with members:
    - "mementomap framework for flexible and adaptive web archive profiling"
    - "difficulties of timestamping archived web pages"
    - "making digital artifacts on the web verifiable and reliable"
    - "decentralized trusted timestamping using the crypto currency bitcoin"
    - "trusty uris verifiable immutable and permanent digital artifacts for linked data"
    - "http mailbox asynchronous restful communication"
    - "preserving peer replicas by rate limited sampled voting"

Connected through hyperedge HE-2 (induced by source paper "collecting 16k archived web pages from 17 public web archives"):
  with members:
    - "archive assisted archival fixity verification framework"
    - "difficulties of timestamping archived web pages"
    - "routing memento requests using binary classifiers"

Connected through hyperedge HE-3 (induced by source paper "difficulties of timestamping archived web pages"):
  with members:
    - "impact of uri canonicalization on memento count"
    - "rules of acquisition for mementos and their content"
    - "decentralized trusted timestamping using the crypto currency bitcoin"
    - "a framework for evaluation of composite memento temporal coherence"
    - "an evaluation of caching policies for memento timemaps"
    - "transparent format migration of preserved web content"

Connected through hyperedge HE-4 (induced by source paper "routing memento requests using binary classifiers"):
  with members:
    - "profiling web archive coverage for top level domain and content language"
    - "an evaluation of caching policies for memento timemaps"

Connected through hyperedge HE-5 (induced by source paper "adapting the hypercube model to archive deferred representations and their descendants"):
  with members:
    - "a framework for evaluation of composite memento temporal coherence"

Connected through hyperedge HE-6 (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"
    - "making web annotations persistent over time"

Connected through hyperedge HE-7 (induced by source paper "a query language for multi version data web archives"):
  with members:
    - "pav ontology provenance authoring and versioning"
    - "diachronic linked data towards long term preservation of structured interrelated information"
    - "an http based versioning mechanism for linked data"
    - "semantics and complexity of sparql"

Connected through hyperedge HE-8 (induced by source paper "avoiding spoilers in fan wikis of episodic fiction"):
  with members:
    - "a framework for evaluation of composite memento temporal coherence"
    - "bringing web time travel to mediawiki an assessment of the memento mediawiki extension"
    - "mj no more using concurrent wikipedia edit spikes with social network plausibility checks for breaking news detection"
    - "evaluating sliding and sticky target policies by measuring temporal drift in acyclic walks through a web archive"

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.IR(Information Retrieval)