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: "indicators of structural change in the dynamics of science entropy statistics of the sci journal citation reports"
  Abstract: Can change in citation patterns among journals be used as an indicator of structural change in the organization of the sciences? Aggregated journal-journal citations for 1999 are compared with similar data in the Journal Citation Reports 1998 of the Science Citation Index. In addition to indicating local change, probabilistic entropy measures enable us to analyze changes in distributions at different levels of aggregation. The results of various statistics are discussed and compared by elaborating the journal-journal mappings. The relevance of this indicator for science and technology policies is further specified.

Connected through hyperedge HE-1 (induced by source paper "can hot spots in the sciences be mapped using the dynamics of aggregated journal journal citation relations"):
  with members:
    - "the dynamics of triads in aggregated journal journal citation relations specialty developments at the above journal level"
    - "interactive overlays of journals and the measurement of interdisciplinarity on the basis of aggregated journal journal citations"
    - "a unified approach to mapping and clustering of bibliometric networks"

Connected through hyperedge HE-2 (induced by source paper "visualization of the citation impact environments of scientific journals an online mapping exercise"):
  with members:
    - "co occurrence matrices and their applications in information science extending aca to the web environment"
    - "classification and powerlaws the logarithmic transformation"
    - "can scientific journals be classified in terms of aggregated journal journal citation relations using the journal citation reports"
    - "toward alternative metrics of journal impact a comparison of download and citation data"

Connected through hyperedge HE-3 (induced by source paper "classification and powerlaws the logarithmic transformation"):
  with members:
    - "co occurrence matrices and their applications in information science extending aca to the web environment"
    - "can scientific journals be classified in terms of aggregated journal journal citation relations using the journal citation reports"

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)