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: "understanding the affect of developers theoretical background and guidelines for psychoempirical software engineering"
  Abstract: Affects--emotions and moods--have an impact on cognitive processing activities and the working performance of individuals. It has been established that software development tasks are undertaken through cognitive processing activities. Therefore, we have proposed to employ psychology theory and measurements in software engineering (SE) research. We have called it "psychoempirical software engineering". However, we found out that existing SE research has often fallen into misconceptions about the affect of developers, lacking in background theory and how to successfully employ psychological measurements in studies. The contribution of this paper is threefold. (1) It highlights the challenges to conduct proper affect-related studies with psychology; (2) it provides a comprehensive literature review in affect theory; and (3) it proposes guidelines for conducting psychoempirical software engineering.

Connected through hyperedge HE-1 (induced by source paper "software engineering education beyond the technical a systematic literature review"):
  with members:
    - "a call to promote soft skills in software engineering"
    - "closing the gap between software engineering education and industrial needs"

Connected through hyperedge HE-2 (induced by source paper "what happens when software developers are un happy"):
  with members:
    - "unhappy developers bad for themselves bad for process and bad for software product"
    - "consequences of unhappiness while developing software"
    - "on the unhappiness of software developers"
    - "mining valence arousal and dominance possibilities for detecting burnout and productivity"
    - "how do you feel developer an explanatory theory of the impact of affects on programming performance"
    - "the affect of software developers common misconceptions and measurements"
    - "do feelings matter on the correlation of affects and the self assessed productivity in software engineering"
    - "software developers moods emotions and performance"

Connected through hyperedge HE-3 (induced by source paper "using experience sampling to link software repositories with emotions and work well being"):
  with members:
    - "a systematic review of productivity factors in software development"
    - "a benchmark study on sentiment analysis for software engineering research"
    - "need for sleep the impact of a night of sleep deprivation on novice developers performance"
    - "bootstrapping a lexicon for emotional arousal in software engineering"
    - "are happy developers more productive"

Connected through hyperedge HE-4 (induced by source paper "analysing developers affectiveness through markov chain models"):
  with members:
    - "easier contagion and weaker ties make anger spread faster than joy in social media"
    - "mining valence arousal and dominance possibilities for detecting burnout and productivity"
    - "happy software developers solve problems better psychological measurements in empirical software engineering"
    - "the role of emotions in contributors activity a case study on the gentoo community"
    - "a computational approach to politeness with application to social factors"

Connected through hyperedge HE-5 (induced by source paper "consequences of unhappiness while developing software"):
  with members:
    - "unhappy developers bad for themselves bad for process and bad for software product"
    - "mining valence arousal and dominance possibilities for detecting burnout and productivity"
    - "how do you feel developer an explanatory theory of the impact of affects on programming performance"
    - "the affect of software developers common misconceptions and measurements"
    - "do feelings matter on the correlation of affects and the self assessed productivity in software engineering"
    - "software developers moods emotions and performance"
    - "happy software developers solve problems better psychological measurements in empirical software engineering"

Connected through hyperedge HE-6 (induced by source paper "on the unhappiness of software developers"):
  with members:
    - "consequences of unhappiness while developing software"
    - "mining valence arousal and dominance possibilities for detecting burnout and productivity"
    - "how do you feel developer an explanatory theory of the impact of affects on programming performance"
    - "the affect of software developers common misconceptions and measurements"
    - "do feelings matter on the correlation of affects and the self assessed productivity in software engineering"
    - "software developers moods emotions and performance"
    - "happy software developers solve problems better psychological measurements in empirical software engineering"

Connected through hyperedge HE-7 (induced by source paper "unhappy developers bad for themselves bad for process and bad for software product"):
  with members:
    - "how do you feel developer an explanatory theory of the impact of affects on programming performance"
    - "do feelings matter on the correlation of affects and the self assessed productivity in software engineering"
    - "software developers moods emotions and performance"
    - "happy software developers solve problems better psychological measurements in empirical software engineering"

Connected through hyperedge HE-8 (induced by source paper "towards a theory of affect and software developers performance"):
  with members:
    - "in need of creative mobile service ideas forget adults and ask young children"
    - "software developers moods emotions and performance"
    - "a framework for systematic analysis of open access journals and its application in software engineering and information systems"
    - "happy software developers solve problems better psychological measurements in empirical software engineering"
    - "the role of emotions in contributors activity a case study on the gentoo community"
    - "are happy developers more productive"
    - "commitment nets in software process improvement"

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)