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: "software graphs and programmer awareness"
  Abstract: School of Mathematics, Statistics and Computer Science,Victoria University of Wellington, P.O. Box 600 Wellington 6140, New Zealand(Dated: February 16, 2008)Dependencies between types in object-oriented software can be viewed as directed graphs, withtypes as nodes and dependencies as edges. The in-degree and out-degree distributions of such graphshave quite diﬀerent forms, with the former resembling a power-law distribution and the latter anexponentialdistribution. This eﬀect appears to be independent of application or type relationship. Asimple generative model is proposed to explore the proposition that the diﬀerence arises because theprogrammer is aware of the out-degree of a type but not of its in-degree. The model reproduces thetwo distributions, and compares reasonably well to those observed in 14 diﬀerent type relationshipsacross 12 diﬀerent Java applications.

Connected through hyperedge HE-1 (induced by source paper "smart contracts software metrics a first study"):
  with members:
    - "blockchain oriented software engineering challenges and new directions"
    - "an empirical analysis of smart contracts platforms applications and design patterns"
    - "power law distributions in class relationships"

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)