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: "an empirical comparison of developer retention in the rubygems and npm software ecosystems"
  Abstract: Software ecosystems can be viewed as socio-technical networks consisting of technical components (software packages) and social components (communities of developers) that maintain the technical components. Ecosystems evolve over time through socio-technical changes that may greatly impact the ecosystem's sustainability. Social changes like developer turnover may lead to technical degradation. This motivates the need to identify those factors leading to developer abandonment, in order to automate the process of identifying developers with high abandonment risk. This paper compares such factors for two software package ecosystems, RubyGems and npm. We analyse the evolution of their packages hosted on GitHub, considering development activity in terms of commits, and social interaction with other developers in terms of comments associated to commits, issues or pull requests. We analyse this socio-technical activity for more than 30k and 60k developers for RubyGems and npm respectively. We use survival analysis to identify which factors coincide with a lower survival probability. Our results reveal that developers with a higher probability to abandon an ecosystem: do not engage in discussions with other developers; do not have strong social and technical activity intensity; communicate or commit less frequently; and do not participate to both technical and social activities for long periods of time. Such observations could be used to automate the identification of developers with a high probability of abandoning the ecosystem and, as such, reduce the risks associated to knowledge loss.

Connected through hyperedge HE-1 (induced by source paper "small world with high risks a study of security threats in the npm ecosystem"):
  with members:
    - "on the evolution of technical lag in the npm package dependency network"
    - "on the impact of micro packages an empirical study of the npm javascript ecosystem"
    - "an empirical comparison of dependency network evolution in seven software packaging ecosystems"
    - "extracting insights from the topology of the javascript package ecosystem"
    - "thou shalt not depend on me analysing the use of outdated javascript libraries on the web"
    - "exposing the hidden web an analysis of third party http requests on 1 million websites"

Connected through hyperedge HE-2 (induced by source paper "on the abandonment and survival of open source projects an empirical investigation"):
  with members:
    - "why do developers take breaks from contributing to oss projects a preliminary analysis"
    - "why we engage in floss answers from core developers"
    - "why modern open source projects fail"
    - "a novel approach for estimating truck factors"

Connected through hyperedge HE-3 (induced by source paper "why do developers take breaks from contributing to oss projects a preliminary analysis"):
  with members:
    - "why modern open source projects fail"
    - "a novel approach for estimating truck factors"

Connected through hyperedge HE-4 (induced by source paper "breaking the borders an investigation of cross ecosystem software packages"):
  with members:
    - "on the evolution of technical lag in the npm package dependency network"
    - "an empirical comparison of dependency network evolution in seven software packaging ecosystems"

Connected through hyperedge HE-5 (induced by source paper "towards an interdisciplinary socio technical analysis of software ecosystem health"):
  with members:
    - "the rise and fall of a central contributor dynamics of social organization and performance in the gentoo community"

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.SE(Software Engineering)