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: "arxiv e prints and the journal of record an analysis of roles and relationships"
  Abstract: Since its creation in 1991, arXiv has become central to the diffusion of research in a number of fields. Combining data from the entirety of arXiv and the Web of Science WoS, this article investigates a the proportion of papers across all disciplines that are on arXiv and the proportion of arXiv papers that are in the WoS, b the elapsed time between arXiv submission and journal publication, and c the aging characteristics and scientific impact of arXiv e-prints and their published version. It shows that the proportion of WoS papers found on arXiv varies across the specialties of physics and mathematics, and that only a few specialties make extensive use of the repository. Elapsed time between arXiv submission and journal publication has shortened but remains longer in mathematics than in physics. In physics, mathematics, as well as in astronomy and astrophysics, arXiv versions are cited more promptly and decay faster than WoS papers. The arXiv versions of papers-both published and unpublished-have lower citation rates than published papers, although there is almost no difference in the impact of the arXiv versions of published and unpublished papers.

Connected through hyperedge HE-1 (induced by source paper "inferring the causal effect of journals on citations"):
  with members:
    - "the journal impact factor a brief history critique and discussion of adverse effects"
    - "use of the journal impact factor for assessing individual articles need not be wrong"
    - "predicting the long term citation impact of recent publications"
    - "the weakening relationship between the impact factor and papers citations in the digital age"
    - "citations versus journal impact factor as proxy of quality could the latter ever be preferable"

Connected through hyperedge HE-2 (induced by source paper "arxiv and the symbiosis of physics preprints and journal review articles a model"):
  with members:
    - "astrophysicists and physicists as creators of arxiv based commenting resources for their research communities an initial survey"
    - "the arxiv of the future will not look like the arxiv"

Connected through hyperedge HE-3 (induced by source paper "arxiv and the ref open access policy"):
  with members:
    - "comparing published scientific journal articles to their pre print versions"
    - "comparing published scientific journal articles to their pre print versions"
    - "does the arxiv lead to higher citations and reduced publisher downloads for mathematics articles"
    - "the effect of open access upon citation impact an analysis of arxiv s condensed matter section"

Connected through hyperedge HE-4 (induced by source paper "network assembly of scientific communities of varying size and specificity"):
  with members:
    - "the author topic model for authors and documents"
    - "mapping subsets of scholarly information"

Connected through hyperedge HE-5 (induced by source paper "tweets as impact indicators examining the implications of automated bot accounts on twitter"):
  with members:
    - "the rise of social bots"
    - "tweets vs mendeley readers how do these two social media metrics differ"
    - "do altmetrics correlate with citations extensive comparison of altmetric indicators with citations from a multidisciplinary perspective"
    - "tweeting biomedicine an analysis of tweets and citations in the biomedical literature"
    - "the role of twitter in the life cycle of a scientific publication"
    - "how the scientific community reacts to newly submitted preprints article downloads twitter mentions and citations"

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)