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: "national scale research performance assessment at the individual level"
  Abstract: There is an evident and rapid trend towards the adoption of evaluation exercises for national research systems for purposes, among others, of improving allocative efficiency in public funding of individual institutions. However the desired macroeconomic aims could be compromised if internal redistribution of government resources within each research institution does not follow a consistent logic: the intended effects of national evaluation systems can result only if a "funds for quality" rule is followed at all levels of decision-making. The objective of this study is to propose a bibliometric methodology for: (i) large-scale comparative evaluation of research performance by individual scientists, research groups and departments within research institution, to inform selective funding allocations; and (ii) assessment of strengths and weaknesses by field of research, to inform strategic planning and control. The proposed methodology has been applied to the hard science disciplines of the Italian university research system for the period 2004---2006.

Connected through hyperedge HE-1 (induced by source paper "a sensitivity analysis of researchers productivity rankings to the time of citation observation"):
  with members:
    - "a sensitivity analysis of research institutions productivity rankings to the time of citation observation"
    - "a heuristic approach to author name disambiguation in bibliometrics databases for large scale research assessments"
    - "assessing the varying level of impact measurement accuracy as a function of the citation window length"
    - "evaluating research from informed peer review to bibliometrics"
    - "a field standardized application of dea to national scale research assessment of universities"
    - "the first italian research assessment exercise a bibliometric perspective"
    - "allocative efficiency in public research funding can bibliometrics help"

Connected through hyperedge HE-2 (induced by source paper "the impact of unproductive and top researchers on overall university research performance"):
  with members:
    - "revisiting size effects in higher education research productivity"
    - "the dispersion of research performance within and between universities as a potential indicator of the competitive intensity in higher education systems"
    - "a heuristic approach to author name disambiguation in bibliometrics databases for large scale research assessments"
    - "research productivity are higher academic ranks more productive than lower ones"
    - "the dangers of performance based research funding in non competitive higher education systems"

Connected through hyperedge HE-3 (induced by source paper "an individual level assessment of the relationship between spin off activities and research performance in universities"):
  with members:
    - "a heuristic approach to author name disambiguation in bibliometrics databases for large scale research assessments"
    - "research collaboration and productivity is there correlation"
    - "the alignment of public research supply and industry demand for effective technology transfer the case of italy"

Connected through hyperedge HE-4 (induced by source paper "selecting competent referees to assess research projects proposals a study of referees registers"):
  with members:
    - "a heuristic approach to author name disambiguation in bibliometrics databases for large scale research assessments"

Connected through hyperedge HE-5 (induced by source paper "a farewell to the mncs and like size independent indicators"):
  with members:
    - "more precise methods for national research citation impact comparisons"
    - "ranking research institutions by the number of highly cited articles per scientist"
    - "how do you define and measure research productivity"
    - "assessing the accuracy of the h and g indexes for measuring researchers productivity"
    - "cwts crown indicator measures citation impact of a research group s publication oeuvre"
    - "towards a new crown indicator some theoretical considerations"
    - "caveats for the journal and field normalizations in the cwts leiden evaluations of research performance"
    - "remaining problems with the new crown indicator mncs of the cwts"

Connected through hyperedge HE-6 (induced by source paper "efficiency of research performance and the glass researcher"):
  with members:
    - "the impact of unproductive and top researchers on overall university research performance"
    - "a farewell to the mncs and like size independent indicators"
    - "methods for the generation of normalized citation impact scores in bibliometrics which method best reflects the judgements of experts"
    - "how do you define and measure research productivity"
    - "on the causes of subject specific citation rates in web of science"
    - "how to evaluate individual researchers working in the natural and life sciences meaningfully a proposal of methods based on percentiles of citations"

Connected through hyperedge HE-7 (induced by source paper "the dispersion of the citation distribution of top scientists publications"):
  with members:
    - "testing the trade off between productivity and quality in research activities"
    - "revisiting the scaling of citations for research assessment"
    - "a heuristic approach to author name disambiguation in bibliometrics databases for large scale research assessments"
    - "the dangers of performance based research funding in non competitive higher education systems"

Connected through hyperedge HE-8 (induced by source paper "the spin off of elite universities in non competitive undifferentiated higher education systems an empirical simulation in italy"):
  with members:
    - "revisiting size effects in higher education research productivity"
    - "the dispersion of research performance within and between universities as a potential indicator of the competitive intensity in higher education systems"
    - "the field standardized average impact of national research systems compared to world average the case of italy"
    - "a heuristic approach to author name disambiguation in bibliometrics databases for large scale research assessments"
    - "research productivity are higher academic ranks more productive than lower ones"
    - "the dangers of performance based research funding in non competitive higher education systems"

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)