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: "benchmarking web testing selenium versus watir and the choice of programming language and browser"
  Abstract: Context: Selenium is claimed to be the most popular software test automation tool. Past academic works have mainly neglected testing tools in favor of more methodological topics. Objective: We investigated the performance of web-testing tools, to provide empirical evidence supporting choices in software test tool selection and configuration. Method: We used 4*5 factorial design to study 20 different configurations for testing a web-store. We studied 5 programming language bindings (C#, Java, Python, and Ruby for Selenium, while Watir supports Ruby only) and 4 browsers (Google Chrome, Internet Explorer, Mozilla Firefox and Opera). Performance was measured with execution time, memory usage, length of the test scripts and stability of the tests. Results: Considering all measures the best configuration was Selenium with Python language binding for Chrome. Selenium with Python bindings was the best option for all browsers. The effect size of the difference between the slowest and fastest configuration was very high (Cohens d=41.5, 91% increase in execution time). Overall Internet Explorer was the fastest browser while having the worst results in the stability. Conclusions: We recommend benchmarking tools before adopting them. Weighting of factors, e.g. how much test stability is one willing to sacrifice for faster performance, affects the decision.

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)