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: "innovation as a nonlinear process the scientometric perspective and the specification of an innovation opportunities explorer"
  Abstract: The process of innovation follows non-linear patterns across the domains of science, technology, and the economy. Novel bibliometric mapping techniques can be used to investigate and represent distinctive, but complementary perspectives on the innovation process (e.g., "demand" and "supply") as well as the interactions among these perspectives. The perspectives can be represented as "continents" of data related to varying extents over time. For example, the different branches of Medical Subject Headings (MeSH) in the Medline database provide sources of such perspectives (e.g., "Diseases" versus "Drugs and Chemicals"). The multiple-perspective approach enables us to reconstruct facets of the dynamics of innovation, in terms of selection mechanisms shaping localizable trajectories and/or resulting in more globalized regimes. By expanding the data with patents and scholarly publications, we demonstrate the use of this multi-perspective approach in the case of RNA Interference (RNAi). The possibility to develop an "Innovation Opportunities Explorer" is specified.

Connected through hyperedge HE-1 (induced by source paper "patents as instruments for exploring innovation dynamics geographic and technological perspectives on photovoltaic cells"):
  with members:
    - "mapping excellence in the geography of science an approach based on scopus data"
    - "mapping uspto patent data using overlays to google maps"
    - "which cities produce excellent papers worldwide more than can be expected a new mapping approach using google maps based on statistical significance testing"

Connected through hyperedge HE-2 (induced by source paper "a routine for measuring synergy in university industry government relations mutual information as a triple helix and quadruple helix indicator"):
  with members:
    - "the triple helix of university industry government relations at the country level and its dynamic evolution under the pressures of globalization"
    - "the swedish system of innovation regional synergies in a knowledge based economy"
    - "statistics for the dynamic analysis of scientometric data the evolution of the sciences in terms of trajectories and regimes"
    - "rotational symmetry and the transformation of innovation systems in a triple helix of university industry government relations"
    - "structuration by intellectual organization the configuration of knowledge in relations among structural components in networks of science"
    - "redundancy in systems which entertain a model of themselves interaction information and the self organization of anticipation"
    - "the mutual information of university industry government relations an indicator of the triple helix dynamics"

Connected through hyperedge HE-3 (induced by source paper "statistics for the dynamic analysis of scientometric data the evolution of the sciences in terms of trajectories and regimes"):
  with members:
    - "how to create an innovation accelerator"
    - "interactive overlays a new method for generating global journal maps from web of science data"
    - "structuration by intellectual organization the configuration of knowledge in relations among structural components in networks of science"
    - "the communication of meaning and the structuration of expectations giddens structuration theory and luhmann s self organization"
    - "the mutual information of university industry government relations an indicator of the triple helix dynamics"

Connected through hyperedge HE-4 (induced by source paper "rotational symmetry and the transformation of innovation systems in a triple helix of university industry government relations"):
  with members:
    - "the swedish system of innovation regional synergies in a knowledge based economy"
    - "the knowledge based economy and the triple helix model"

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)