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: "mapping the geography of science distribution patterns and networks of relations among cities and institutes"
  Abstract: Using Google Earth, Google Maps and/or network visualization programs such as Pajek, one can overlay the network of relations among addresses in scientific publications on the geographic map. We discuss the pros en cons of the various options, and provide software (freeware) for bridging existing gaps between the Science Citation Indices and Scopus, on the one side, and these various visualization tools, on the other. At the level of city names, the global map can be drawn reliably on the basis of the available address information. At the level of the names of organizations and institutes, there are problems of unification both in the ISI-databases and Scopus. Pajek enables us to combine the visualization with statistical analysis, whereas the Google Maps and its derivates provide superior tools at the Internet.

Connected through hyperedge HE-1 (induced by source paper "on the challenges ahead of spatial scientometrics focusing on the city level"):
  with members:
    - "the geography of references in elite articles which countries contribute to the archives of knowledge"
    - "a spatial scientometric analysis of the publication output of cities worldwide"
    - "exploring the position of cities in global corporate research and development a bibliometric analysis by two different geographical approaches"
    - "concentration of research funding leads to decreasing marginal returns"
    - "a methodology to compute the territorial productivity of scientists the case of italy"
    - "a new bibliometric approach to assess the scientific specialization of regions"
    - "the european union china and the united states in the top 1 and top 10 layers of most frequently cited publications competition and collaborations"
    - "mapping excellence in the geography of science an approach based on scopus data"

Connected through hyperedge HE-2 (induced by source paper "strategic intelligence on emerging technologies scientometric overlay mapping"):
  with members:
    - "what is an emerging technology"
    - "patents as instruments for exploring innovation dynamics geographic and technological perspectives on photovoltaic cells"
    - "interactive overlays of journals and the measurement of interdisciplinarity on the basis of aggregated journal journal citations"
    - "bibliometric perspectives on medical innovation using the medical subject headings mesh of pubmed"
    - "a new methodology for constructing a publication level classification system of science"
    - "mapping uspto patent data using overlays to google maps"
    - "the detection of hot regions in the geography of science a visualization approach by using density maps"
    - "science overlay maps a new tool for research policy and library management"

Connected through hyperedge HE-3 (induced by source paper "a spatial scientometric analysis of the publication output of cities worldwide"):
  with members:
    - "mapping spatial and temporal changes of global corporate research and development activities by conducting a bibliometric analysis"
    - "exploring the position of cities in global corporate research and development a bibliometric analysis by two different geographical approaches"
    - "the journal coverage of web of science and scopus a comparative analysis"
    - "how have the eastern european countries of the former warsaw pact developed since 1990 a bibliometric study"
    - "mapping excellence in the geography of science an approach based on scopus data"
    - "globalisation of science in kilometres"
    - "the detection of hot regions in the geography of science a visualization approach by using density maps"

Connected through hyperedge HE-4 (induced by source paper "scientometric mapping as a strategic intelligence tool for the governance of emerging technologies"):
  with members:
    - "patents as instruments for exploring innovation dynamics geographic and technological perspectives on photovoltaic cells"
    - "interactive overlays of journals and the measurement of interdisciplinarity on the basis of aggregated journal journal citations"
    - "bibliometric perspectives on medical innovation using the medical subject headings mesh of pubmed"
    - "the detection of"
    - "mapping uspto patent data using overlays to google maps"
    - "the detection of hot regions in the geography of science a visualization approach by using density maps"
    - "science overlay maps a new tool for research policy and library management"

Connected through hyperedge HE-5 (induced by source paper "interactive overlays of journals and the measurement of interdisciplinarity on the basis of aggregated journal journal citations"):
  with members:
    - "global maps of science based on the new web of science categories"
    - "interactive overlay maps for us patent uspto data based on international patent classifications ipc"
    - "interdisciplinarity at the journal and specialty level the changing knowledge bases of the journal cognitive science"
    - "interactive overlays a new method for generating global journal maps from web of science data"
    - "which cities produce excellent papers worldwide more than can be expected a new mapping approach using google maps based on statistical significance testing"
    - "the structure of the arts humanities citation index a mapping on the basis of aggregated citations among 1 157 journals"
    - "how journal rankings can suppress interdisciplinary research a comparison between innovation studies and business management"
    - "a unified approach to mapping and clustering of bibliometric networks"

Connected through hyperedge HE-6 (induced by source paper "international co authorship relations in the social science citation index is internationalization leading the network"):
  with members:
    - "the structure of the arts humanities citation index a mapping on the basis of aggregated citations among 1 157 journals"

Connected through hyperedge HE-7 (induced by source paper "interactive overlay maps for us patent uspto data based on international patent classifications ipc"):
  with members:
    - "how to create an innovation accelerator"
    - "interactive overlays a new method for generating global journal maps from web of science data"
    - "publish or patent bibliometric evidence for empirical trade offs in national funding strategies"
    - "which cities produce excellent papers worldwide more than can be expected a new mapping approach using google maps based on statistical significance testing"
    - "the structure of the arts humanities citation index a mapping on the basis of aggregated citations among 1 157 journals"
    - "how journal rankings can suppress interdisciplinary research a comparison between innovation studies and business management"
    - "a unified approach to mapping and clustering of bibliometric networks"
    - "indicators of the interdisciplinarity of journals diversity centrality and citations"

Connected through hyperedge HE-8 (induced by source paper "ranking and mapping of universities and research focused institutions worldwide based on highly cited papers a visualization of results from multi level models"):
  with members:
    - "on the calculation of percentile based bibliometric indicators"
    - "the use of percentiles and percentile rank classes in the analysis of bibliometric data opportunities and limits"
    - "the leiden ranking 2011 2012 data collection indicators and interpretation"
    - "mapping excellence in the geography of science an approach based on scopus data"
    - "turning the tables in citation analysis one more time principles for comparing sets of documents"
    - "testing differences statistically with the leiden ranking"
    - "the detection of hot regions in the geography of science a visualization approach by using density maps"

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)