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: "when why and how to test spreadsheets"
  Abstract: Testing is a vital part of software development, and spreadsheets are like any other software in this respect. This paper discusses the testing of spreadsheets in the light of one practitioner’s experience. It considers the concept of software testing and how it differs from reviewing, and describes when it might take place. Different types of testing are described, and some techniques for performing them presented. Some of the commonly encountered problems are discussed.

Connected through hyperedge HE-1 (induced by source paper "the reification of an incorrect and inappropriate spreadsheet model"):
  with members:
    - "what s the point of documentation"
    - "evaluating financial model performance an empirical analysis of some north sea investments"
    - "reducing overconfidence in spreadsheet development"
    - "recommended practices for spreadsheet testing"

Connected through hyperedge HE-2 (induced by source paper "defending the future an msc module in end user computing risk management"):
  with members:
    - "milestones for teaching the spreadsheet program"
    - "eusprig team work tools education audit management"
    - "reducing overconfidence in spreadsheet development"
    - "controlling end user computing applications a case study"
    - "investigating the potential of test driven development for spreadsheet engineering"
    - "the importance and criticality of spreadsheets in the city of london"
    - "recommended practices for spreadsheet testing"
    - "spreadsheet engineering a research framework"

Connected through hyperedge HE-3 (induced by source paper "a practical approach to managing spreadsheet risk in a global business"):
  with members:
    - "end user computing in aib capital markets a management summary"
    - "enterprise spreadsheet management a necessary good"
    - "sarbanes oxley what about all the spreadsheets"

Connected through hyperedge HE-4 (induced by source paper "embedded spreadsheet modelling"):
  with members:
    - "why task based training is superior to traditional training methods"
    - "the importance and criticality of spreadsheets in the city of london"

Connected through hyperedge HE-5 (induced by source paper "end user computing in aib capital markets a management summary"):
  with members:
    - "correctness is not enough"

Connected through hyperedge HE-6 (induced by source paper "investigating the potential of test driven development for spreadsheet engineering"):
  with members:
    - "a novel approach to formulae production and overconfidence measurement to reduce risk in spreadsheet modelling"
    - "classification of spreadsheet errors"
    - "stop that subversive spreadsheet"
    - "the importance and criticality of spreadsheets in the city of london"
    - "spreadsheet engineering a research framework"

Connected through hyperedge HE-7 (induced by source paper "towards a spreadsheet engineering"):
  with members:
    - "a paradigm for spreadsheet engineering methodologies"
    - "recommended practices for spreadsheet testing"
    - "spreadsheet engineering a research framework"

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)