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: "building sustainable software the csdms approach"
  Abstract: CSDMS, The Community Surface Dynamics Modeling System, is an NSF funded project whose focus is to aid a diverse community of earth and ocean system model users and developers to use and create robust software quickly. To this end, CSDMS develops, integrates, archives and disseminates earth-system models and tools to an international (67 country) community with the goal of building the set of tools necessary to model the earth system. Modelers use CSDMS for access to hundreds of open source surface-dynamics models and tools, as well as model metadata. Such a model repository increases model transparency and helps eliminate duplication by presenting the current state of modeling efforts. To increase software sustainability, composability and interoperability, CSDMS promotes standards that define common modeling interfaces, semantic mediation between models, and model metadata. Through online resources and workshops, CSDMS promotes software engineering best practices, which are unfamiliar to many developers within our modeling community. For example, version control, unit testing, continuous integration, test-driven development, and well-written clean code are all topics of the educational mission of CSDMS.

Connected through hyperedge HE-1 (induced by source paper "second workshop on on sustainable software for science practice and experiences wssspe2 submission peer review and sorting process and results"):
  with members:
    - "sustainable software ecosystems software engineers domain scientists and engineers collaborating for science"
    - "code review for and by scientists"
    - "the need for a versioned data analysis software environment"
    - "seeking the principles of sustainable software engineering"
    - "summary of the first workshop on sustainable software for science practice and experiences wssspe1"
    - "transitive credit as a means to address social and technological concerns stemming from citation and attribution of digital products"
    - "first workshop on on sustainable software for science practice and experiences wssspe submission and peer review process and results"

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)