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: "gender differences in research productivity a bibliometric analysis of the italian academic system"
  Abstract: The literature dedicated to the analysis of the difference in research productivity between the sexes tends to agree in indicating better performance for men. Through bibliometric examination of the entire population of research personnel working in the scientific-technological disciplines of Italian university system, this study confirms the presence of significant differences in productivity between men and women. The differences are, however, smaller than reported in a large part of the literature, confirming an ongoing tendency towards decline, and are also seen as more noticeable for quantitative performance indicators than other indicators. The gap between the sexes shows significant sectorial differences. In spite of the generally better performance of men, there are scientific sectors in which the performance of women does not prove to be inferior.

Connected through hyperedge HE-1 (induced by source paper "the collaboration behavior of top scientists"):
  with members:
    - "measuring science irresistible temptations easy shortcuts and dangerous consequences"
    - "revisiting the scientometric conceptualization of impact and its measurement"
    - "the relationship among research productivity research collaboration and their determinants"
    - "variation in research collaboration patterns across academic ranks"
    - "how do you define and measure research productivity"
    - "individual research performance a proposal for comparing apples to oranges"
    - "the collaboration behaviors of scientists in italy a field level analysis"
    - "gender differences in research collaboration"

Connected through hyperedge HE-2 (induced by source paper "historical comparison of gender inequality in scientific careers across countries and disciplines"):
  with members:
    - "the misleading narrative of the canonical faculty productivity trajectory"
    - "gender productivity and prestige in computer science faculty hiring networks"
    - "the journal coverage of web of science and scopus a comparative analysis"
    - "quantifying long term scientific impact"
    - "the contribution of star scientists to overall sex differences in research productivity"

Connected through hyperedge HE-3 (induced by source paper "the effects of gender age and academic rank on research diversification"):
  with members:
    - "specialization versus diversification in research activities the extent intensity and relatedness of field diversification by individual scientists"
    - "the combined effects of age and seniority on research performance of full professors"
    - "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"

Connected through hyperedge HE-4 (induced by source paper "the relationship among research productivity research collaboration and their determinants"):
  with members:
    - "the combined effects of age and seniority on research performance of full professors"
    - "variation in research collaboration patterns across academic ranks"
    - "how do you define and measure research productivity"
    - "the collaboration behaviors of scientists in italy a field level analysis"
    - "gender differences in research collaboration"
    - "what is the appropriate length of the publication period over which to assess research performance"
    - "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"

Connected through hyperedge HE-5 (induced by source paper "gender bias in academic recruitment"):
  with members:
    - "selection committees for academic recruitment does gender matter"
    - "the determinants of academic career advancement evidence from italy"
    - "relatives in the same university faculty nepotism or merit"
    - "how do you define and measure research productivity"
    - "career advancement and scientific performance in universities"
    - "measuring institutional research productivity for the life sciences the importance of accounting for the order of authors in the byline"
    - "individual research performance a proposal for comparing apples to oranges"
    - "the importance of accounting for the number of co authors and their order when assessing research performance at the individual level in the life sciences"

Connected through hyperedge HE-6 (induced by source paper "the combined effects of age and seniority on research performance of full professors"):
  with members:
    - "measuring science irresistible temptations easy shortcuts and dangerous consequences"
    - "variation in research collaboration patterns across academic ranks"
    - "variability of research performance across disciplines within universities in non competitive higher education systems"
    - "career advancement and scientific performance in universities"
    - "individual research performance a proposal for comparing apples to oranges"
    - "what is the appropriate length of the publication period over which to assess research performance"
    - "how important is choice of the scaling factor in standardizing citations"
    - "a heuristic approach to author name disambiguation in bibliometrics databases for large scale research assessments"

Connected through hyperedge HE-7 (induced by source paper "should the research performance of scientists be distinguished by gender"):
  with members:
    - "individual research performance a proposal for comparing apples to oranges"
    - "the importance of accounting for the number of co authors and their order when assessing research performance at the individual level in the life sciences"
    - "gender differences in research collaboration"
    - "what is the appropriate length of the publication period over which to assess research performance"
    - "revisiting size effects in higher education research productivity"
    - "revisiting the scaling of citations for research assessment"
    - "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"

Connected through hyperedge HE-8 (induced by source paper "gender differences in research collaboration"):
  with members:
    - "the impact of unproductive and top researchers on overall university research performance"
    - "the collaboration behaviors of scientists in italy a field level analysis"
    - "a heuristic approach to author name disambiguation in bibliometrics databases for large scale research assessments"
    - "the contribution of star scientists to overall sex differences in research productivity"
    - "research collaboration and productivity is there correlation"

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)