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: "sustainable software ecosystems software engineers domain scientists and engineers collaborating for science"
  Abstract: The development of scientic software is often a partnership between domain scientists and scientic software engineers. It is especially important to embrace these collaborations when developing advanced scientic software, where sustainability, reproducibility, and extensibility are important. In the ideal case, as discussed in this manuscript, this brings together teams composed of the world’s foremost scientic experts in a given eld

Connected through hyperedge HE-1 (induced by source paper "lightning talk report on software metrics for research software"):
  with members:
    - "seeking the principles of sustainable software engineering"
    - "which sustainable software practices do scientists find most useful"
    - "dune as an example of sustainable open source scientific software development"
    - "extensible component based architecture for flash a massively parallel multiphysics simulation code"

Connected through hyperedge HE-2 (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:
    - "code review for and by scientists"
    - "the need for a versioned data analysis software environment"
    - "seeking the principles of sustainable software engineering"
    - "building sustainable software the csdms approach"
    - "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)