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: "how to create an innovation accelerator"
  Abstract: The purpose of this White Paper of the EU Support Action “Visioneer” (see www.visioneer.ethz.ch) is to address the following goals: #R##N##R##N#1.#R##N##R##N#Identify new ways of publishing, evaluating, and reporting scientific progress.#R##N##R##N##R##N##R##N##R##N#2.#R##N##R##N#Promote ICT solutions to increase the awareness of new emerging trends.#R##N##R##N##R##N##R##N##R##N#3.#R##N##R##N#Invent tools to enhance Europe’s innovation potential.#R##N##R##N##R##N##R##N##R##N#4.#R##N##R##N#Develop new strategies to support a sustainable technological development.#R##N##R##N##R##N##R##N##R##N#5.#R##N##R##N#Lay the foundations for new ways to reach societal benefits and respond to industrial needs using ICT.

Connected through hyperedge HE-1 (induced by source paper "an analytical framework to nowcast well being using mobile phone data"):
  with members:
    - "harnessing mobile phone social network topology to infer users demographic attributes"
    - "estimating food consumption and poverty indices with mobile phone data"
    - "evaluating socio economic state of a country analyzing airtime credit and mobile phone datasets"
    - "a planetary nervous system for social mining and collective awareness"
    - "four degrees of separation"

Connected through hyperedge HE-2 (induced by source paper "new ways to promote sustainability and social well being in a complex strongly interdependent world the futurict approach"):
  with members:
    - "measuring the happiness of large scale written expression songs blogs and presidents"

Connected through hyperedge HE-3 (induced by source paper "interactive overlay maps for us patent uspto data based on international patent classifications ipc"):
  with members:
    - "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"
    - "a comparison of two techniques for bibliometric mapping multidimensional scaling and vos"

Connected through hyperedge HE-4 (induced by source paper "innovation as a nonlinear process the scientometric perspective and the specification of an innovation opportunities explorer"):
  with members:
    - "the knowledge based economy and the triple helix model"
    - "mapping excellence in the geography of science an approach based on scopus data"
    - "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"
    - "what can heterogeneity add to the scientometric map steps towards algorithmic historiography"
    - "mapping the geography of science distribution patterns and networks of relations among cities and institutes"
    - "science overlay maps a new tool for research policy and library management"

Connected through hyperedge HE-5 (induced by source paper "bibliometric perspectives on medical innovation using the medical subject headings mesh of pubmed"):
  with members:
    - "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"
    - "a unified approach to mapping and clustering of bibliometric networks"
    - "mapping the geography of science distribution patterns and networks of relations among cities and institutes"
    - "co occurrence matrices and their applications in information science extending aca to the web environment"
    - "science overlay maps a new tool for research policy and library management"

Connected through hyperedge HE-6 (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:
    - "innovation as a nonlinear process the scientometric perspective and the specification of an innovation opportunities explorer"
    - "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-7 (induced by source paper "a planetary nervous system for social mining and collective awareness"):
  with members:
    - "calibrating data to sensitivity in private data analysis"
    - "futurict the road towards ethical ict"
    - "a classification for community discovery methods in complex networks"
    - "measuring the happiness of large scale written expression songs blogs and presidents"

Connected through hyperedge HE-8 (induced by source paper "theoretical and technological building blocks for an innovation accelerator"):
  with members:
    - "collective dynamics of social annotation"
    - "a meta evaluation of scientific research proposals different ways of comparing rejected to awarded applications"

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)