human: Given a hyperedge-centered hypergraph: <hypergraph>, where the center hyperedge is induced by one source paper and its member nodes are the cited papers.

Details of the hypergraph:
Center hyperedge (induced by source paper "a tale of two databases the use of web of science and scopus in academic papers"):
  Abstract: Web of Science and Scopus are two world-leading and competing citation databases. By using the Science Citation Index Expanded and Social Sciences Citation Index, this paper conducts a comparative, dynamic, and empirical study focusing on the use of Web of Science (WoS) and Scopus in academic papers published during 2004 and 2018. This brief communication reveals that although both Web of Science and Scopus are increasingly used in academic papers, Scopus as a new-comer is really challenging the dominating role of WoS. Researchers from more and more countries/regions and knowledge domains are involved in the use of these two databases. Even though the main producers of related papers are developed economies, some developing economies such as China, Brazil and Iran also act important roles but with different patterns in the use of these two databases. Both two databases are widely used in meta-analysis related studies especially for researchers in China. Health/medical science related domains and the traditional Information Science & Library Science field stand out in the use of citation databases.

Includes members:
  Member "funding information in web of science an updated overview":
    also connected through other hyperedges:
      (none)
  Member "google scholar web of science and scopus a systematic comparison of citations in 252 subject categories":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "academic collaboration rates and citation associations vary substantially between countries and fields")
  Member "missing author address information in web of science an explorative study":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "funding information in web of science an updated overview")
  Member "trends in russian research output indexed in scopus and web of science":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "prevalence of potentially predatory publishing in scopus on the country level")
  Member "book reviews in academic journals patterns and dynamics":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "missing author address information in web of science an explorative study")
  Member "publish or impoverish an investigation of the monetary reward system of science in china 1999 2016":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "does monetary support increase citation impact of scholarly papers")
  Member "the journal coverage of web of science and scopus a comparative analysis":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "funding information in web of science an updated overview")
  Member "large scale analysis of the accuracy of the journal classification systems of web of science and scopus":
    also connected through other hyperedges:
      - Hyperedge HE-7 (induced by source paper "practical method to reclassify web of science articles into unique subject categories and broad disciplines")

Question: Please tell me which class the source paper 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)