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: "on the causes of subject specific citation rates in web of science"
  Abstract: It is well known in bibliometrics that the average number of citations per paper differs greatly between the various disciplines. The differing citation culture (in particular the different average number of references per paper and thereby the different probability of being cited) is widely seen as the cause of this variation. Based on all Web of Science (WoS) records published in 1990, 1995, 2000, 2005, and 2010 we demonstrate that almost all disciplines show similar numbers of references in the appendices of their papers. Our results suggest that the average citation rate is far more influenced by the extent to which the papers (cited as references) are included in WoS as linked database records. For example, the comparatively low citation rates in the humanities are not at all the result of a lower average number of references per paper but are caused by the low fraction of linked references which refer to papers published in the core journals covered by WoS.

Connected through hyperedge HE-1 (induced by source paper "how well does i3 perform for impact measurement compared to other bibliometric indicators the convergent validity of several field normalized indicators"):
  with members:
    - "which differences can be expected when two universities in the leiden ranking are compared some benchmarks for institutional research evaluations"
    - "creativity in science and the link to cited references is the creative potential of papers reflected in their cited references"
    - "revisiting relative indicators and provisional truths"
    - "which type of citation analysis generates the most accurate taxonomy of scientific and technical knowledge"
    - "citation score normalized by cited references csncr the introduction of a new citation impact indicator"
    - "a review of theory and practice in scientometrics"
    - "a review of the literature on citation impact indicators"
    - "how are excellent highly cited papers defined in bibliometrics a quantitative analysis of the literature"

Connected through hyperedge HE-2 (induced by source paper "critical rationalism and the search for standard field normalized indicators in bibliometrics"):
  with members:
    - "algorithmically generated subject categories based on citation relations an empirical micro study using papers on overall water splitting"
    - "relative citation ratio rcr an empirical attempt to study a new field normalized bibliometric indicator"
    - "citation score normalized by cited references csncr the introduction of a new citation impact indicator"
    - "a review of the literature on citation impact indicators"
    - "how are excellent highly cited papers defined in bibliometrics a quantitative analysis of the literature"
    - "methods for the generation of normalized citation impact scores in bibliometrics which method best reflects the judgements of experts"
    - "alternative metrics in scientometrics a meta analysis of research into three altmetrics"
    - "measuring impact in research evaluations a thorough discussion of methods for effects of and problems with impact measurements"

Connected through hyperedge HE-3 (induced by source paper "algorithmically generated subject categories based on citation relations an empirical micro study using papers on overall water splitting"):
  with members:
    - "granularity of algorithmically constructed publication level classifications of research publications identification of topics"
    - "which type of citation analysis generates the most accurate taxonomy of scientific and technical knowledge"
    - "a review of theory and practice in scientometrics"
    - "large scale analysis of the accuracy of the journal classification systems of web of science and scopus"
    - "a review of the literature on citation impact indicators"
    - "methods for the generation of normalized citation impact scores in bibliometrics which method best reflects the judgements of experts"
    - "the normalization of citation counts based on classification systems"
    - "source normalized indicators of citation impact an overview of different approaches and an empirical comparison"

Connected through hyperedge HE-4 (induced by source paper "core elements in the process of citing publications conceptual overview of the literature"):
  with members:
    - "the number of linked references of publications in microsoft academic in comparison with the web of science"
    - "citation analysis with microsoft academic"
    - "characterizing in text citations in scientific articles a large scale analysis"
    - "the coverage of microsoft academic analyzing the publication output of a university"
    - "excellence networks in science a web based application based on bayesian multilevel logistic regression bmlr for the identification of institutions collaborating successfully"
    - "what is the effect of country specific characteristics on the research performance of scientific institutions using multi level statistical models to rank and map universities and research focused institutions worldwide"
    - "how to evaluate individual researchers working in the natural and life sciences meaningfully a proposal of methods based on percentiles of citations"
    - "the leiden ranking 2011 2012 data collection indicators and interpretation"

Connected through hyperedge HE-5 (induced by source paper "opium in science and society numbers"):
  with members:
    - "core elements in the process of citing publications conceptual overview of the literature"
    - "introducing citedreferencesexplorer crexplorer a program for reference publication year spectroscopy with cited references standardization"
    - "a review of the characteristics of 108 author level bibliometric indicators"
    - "which of the world s institutions employ the most highly cited researchers an analysis of the data from highlycited com"
    - "measuring impact in research evaluations a thorough discussion of methods for effects of and problems with impact measurements"
    - "research misconduct definitions manifestations and extent"
    - "severe language effect in university rankings particularly germany and france are wronged in citation based rankings"

Connected through hyperedge HE-6 (induced by source paper "measuring the academic reputation through citation networks via pagerank"):
  with members:
    - "a critical comparative analysis of five world university rankings"
    - "wikipedia ranking of world universities"
    - "on the internal dynamics of the shanghai ranking"
    - "the leiden ranking 2011 2012 data collection indicators and interpretation"
    - "pagerank for ranking authors in co citation networks"
    - "big macs and eigenfactor scores don t let correlation coefficients fool you"

Connected through hyperedge HE-7 (induced by source paper "citation score normalized by cited references csncr the introduction of a new citation impact indicator"):
  with members:
    - "a review of theory and practice in scientometrics"
    - "a review of the literature on citation impact indicators"
    - "investigation of partition cells as a structural basis suitable for assessments of individual scientists"
    - "methods for the generation of normalized citation impact scores in bibliometrics which method best reflects the judgements of experts"
    - "growth in the number of references in engineering journal papers during the 1972 2013 period"
    - "universality of scholarly impact metrics"
    - "citation analysis may severely underestimate the impact of clinical research as compared to basic research"
    - "a systematic empirical comparison of different approaches for normalizing citation impact indicators"

Connected through hyperedge HE-8 (induced by source paper "is collaboration among scientists related to the citation impact of papers because their quality increases with collaboration an analysis based on data from f1000prime and normalized citation scores"):
  with members:
    - "excellence networks in science a web based application based on bayesian multilevel logistic regression bmlr for the identification of institutions collaborating successfully"
    - "validity of altmetrics data for measuring societal impact a study using data from altmetric and f1000prime"
    - "how are excellent highly cited papers defined in bibliometrics a quantitative analysis of the literature"
    - "the substantive and practical significance of citation impact differences between institutions guidelines for the analysis of percentiles using effect sizes and confidence intervals"
    - "do altmetrics point to the broader impact of research an overview of benefits and disadvantages of altmetrics"
    - "brics countries and scientific excellence a bibliometric analysis of most frequently cited papers"
    - "how to calculate the practical significance of citation impact differences an empirical example from evaluative institutional bibliometrics using adjusted predictions and marginal effects"
    - "the wisdom of citing scientists"

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)