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: "self selected or mandated open access increases citation impact for higher quality research"
  Abstract: Articles whose authors make them Open Access (OA) by self-archiving them online are cited significantly more than articles accessible only to subscribers. Some have suggested that this "OA Advantage" may not be causal but just a self-selection bias, because authors preferentially make higher-quality articles OA. To test this we compared self-selective self-archiving with mandatory self-archiving for a sample of 27,197 articles published 2002-2006 in 1,984 journals. The OA Advantage proved just as high for both. Logistic regression showed that the advantage is independent of other correlates of citations (article age; journal impact factor; number of co-authors, references or pages; field; article type; country or institution) and greatest for the most highly cited articles. The OA Advantage is real, independent and causal, but skewed. Its size is indeed correlated with quality, just as citations themselves are (the top 20% of articles receive about 80% of all citations). The advantage is greater for the more citeable articles, not because of a quality bias from authors self-selecting what to make OA, but because of a quality advantage, from users self-selecting what to use and cite, freed by OA from the constraints of selective accessibility to subscribers only. [See accompanying RTF file for responses to feedback. Four PDF files provide Supplementary Analysis.]

Connected through hyperedge HE-1 (induced by source paper "the citation advantage of linking publications to research data"):
  with members:
    - "which type of citation analysis generates the most accurate taxonomy of scientific and technical knowledge"
    - "distortive effects of initial based name disambiguation on measurements of large scale coauthorship networks"
    - "the discretised lognormal and hooked power law distributions for complete citation data best options for modelling and regression"
    - "regression for citation data an evaluation of different methods"
    - "efficient estimation of word representations in vector space"
    - "mandated data archiving greatly improves access to research data"
    - "linking to data effect on citation rates in astronomy"
    - "the numpy array a structure for efficient numerical computation"

Connected through hyperedge HE-2 (induced by source paper "publication modalities article in press and open access in relation to journal average citation"):
  with members:
    - "prevalence and citation advantage of gold open access in the subject areas of the scopus database"
    - "influencia de la fecha de publicacion online de los articulos cientificos en los indicadores bibliometricos"
    - "reconsidering the gold open access citation advantage postulate in a multidisciplinary context an analysis of the subject categories in the web of science database 2009 2014"
    - "the open access advantage considering citation article usage and social media attention"
    - "an approach to the author citation potential measures of scientific performance which are invariant across scientific fields"
    - "comparing journals from different fields of science and social science through a jcr subject categories normalized impact factor"
    - "the effect of use and access on citations"

Connected through hyperedge HE-3 (induced by source paper "the citation advantage of foreign language references for chinese social science papers"):
  with members:
    - "are the discretised lognormal and hooked power law distributions plausible for citation data"
    - "regression for citation data an evaluation of different methods"
    - "comparing journals from different fields of science and social science through a jcr subject categories normalized impact factor"
    - "how to improve the prediction based on citation impact percentiles for years shortly after the publication date"

Connected through hyperedge HE-4 (induced by source paper "the relationship between usage and citations in an open access mega journal"):
  with members:
    - "the open access advantage considering citation article usage and social media attention"
    - "a principal component analysis of 39 scientific impact measures"
    - "toward alternative metrics of journal impact a comparison of download and citation data"

Connected through hyperedge HE-5 (induced by source paper "disentangling gold open access"):
  with members:
    - "green and gold open access percentages and growth by discipline"
    - "positional effects on citation and readership in arxiv"
    - "does the arxiv lead to higher citations and reduced publisher downloads for mathematics articles"

Connected through hyperedge HE-6 (induced by source paper "prevalence and citation advantage of gold open access in the subject areas of the scopus database"):
  with members:
    - "reconsidering the gold open access citation advantage postulate in a multidisciplinary context an analysis of the subject categories in the web of science database 2009 2014"
    - "the open access advantage considering citation article usage and social media attention"
    - "an approach to the author citation potential measures of scientific performance which are invariant across scientific fields"
    - "comparing journals from different fields of science and social science through a jcr subject categories normalized impact factor"
    - "the effect of use and access on citations"

Connected through hyperedge HE-7 (induced by source paper "amplifying the impact of open access wikipedia and the diffusion of science"):
  with members:
    - "altmetrics chapter from beyond bibliometrics harnessing multidimensional indicators of scholarly impact"
    - "laboratories of oligarchy how the iron law extends to peer production"
    - "scientific citations in wikipedia"

Connected through hyperedge HE-8 (induced by source paper "reconsidering the gold open access citation advantage postulate in a multidisciplinary context an analysis of the subject categories in the web of science database 2009 2014"):
  with members:
    - "the open access advantage considering citation article usage and social media attention"
    - "the effect of use and access on 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.CY(Computers and Society)