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The original slides have already shown the ideas of the presentation . You should read other papers , journals or textbooks to add things like the details, procedures, methods, examples and algorithms of deriving/generating the data from/for the real world, preventing projects benchmarked from taking shortcuts and do cheatings, and how database benchmarks pick, choose, vary and change the variables/parameters. You can describe the details, contents or examples directly or use them to explain the existing content . Show the referenced paper and where the content are . You can refer to the original slides or relevant slides.