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: "ranking journals could google scholar metrics be an alternative to journal citation reports and scimago journal rank"
  Abstract: The launch of Google Scholar Metrics as a tool for assessing scientific journals may be serious competition for Thomson Reuters' Journal Citation Reports, and for Scopus' powered Scimago Journal Rank. , A review of these bibliometric journal evaluation products is performed. We compare their main characteristics from different approaches: coverage, indexing policies, search and visualization, bibliometric indicators, results analysis options, economic cost and differences in their ranking of journals. Despite its shortcomings, Google Scholar Metrics is a helpful tool for authors and editors in identifying core journals. As an increasingly useful tool for ranking scientific journals, it may also challenge established journals products.

Connected through hyperedge HE-1 (induced by source paper "google scholar as a data source for research assessment"):
  with members:
    - "can we use google scholar to identify highly cited documents"
    - "a two sided academic landscape portrait of highly cited documents in google scholar 1950 2013"
    - "2016 google scholar metrics released a matter of languages and something else"
    - "methods for estimating the size of google scholar"
    - "a new methodology for comparing google scholar and scopus"
    - "google scholar metrics 2014 a low cost bibliometric tool"
    - "does google scholar contain all highly cited documents 1950 2013"
    - "h index of scientific nursing journals according to google scholar metrics 2007 2011"

Connected through hyperedge HE-2 (induced by source paper "google scholar the big data bibliographic tool"):
  with members:
    - "methods for estimating the size of google scholar"
    - "h index of scientific nursing journals according to google scholar metrics 2007 2011"
    - "h index communication journals according to google scholar metrics 2008 2012"

Connected through hyperedge HE-3 (induced by source paper "methods for estimating the size of google scholar"):
  with members:
    - "the silent fading of an academic search engine the case of microsoft academic search"
    - "google scholar metrics evolution an analysis according to languages"

Connected through hyperedge HE-4 (induced by source paper "the silent fading of an academic search engine the case of microsoft academic search"):
  with members:
    - "google scholar metrics evolution an analysis according to languages"
    - "the google scholar experiment how to index false papers and manipulate bibliometric indicators"
    - "coverage and adoption of altmetrics sources in the bibliometric community"

Connected through hyperedge HE-5 (induced by source paper "does google scholar contain all highly cited documents 1950 2013"):
  with members:
    - "google scholar metrics 2014 a low cost bibliometric tool"
    - "about the size of google scholar playing the numbers"
    - "the new excellence indicator in the world report of the scimago institutions rankings 2011"

Connected through hyperedge HE-6 (induced by source paper "h index communication journals according to google scholar metrics 2008 2012"):
  with members:
    - "h index of scientific nursing journals according to google scholar metrics 2007 2011"
    - "manipulating google scholar citations and google scholar metrics simple easy and tempting"

Connected through hyperedge HE-7 (induced by source paper "the google scholar experiment how to index false papers and manipulate bibliometric indicators"):
  with members:
    - "manipulating google scholar citations and google scholar metrics simple easy and tempting"
    - "the inconsistency of the h index"

Connected through hyperedge HE-8 (induced by source paper "h index of scientific nursing journals according to google scholar metrics 2007 2011"):
  with members:
    - "manipulating google scholar citations and google scholar metrics simple easy and tempting"

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)