R version 3.1.0 (2014-04-10) -- "Spring Dance"
Copyright (C) 2014 The R Foundation for Statistical Computing
Platform: x86_64-apple-darwin13.1.0 (64-bit)

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[R.app GUI 1.63 (6734) x86_64-apple-darwin13.1.0]

> library(YaleToolkit)
> library(ggplot2)
> data(Derek)
> head(Derek)
[1] 3rd Year Ph.D Student
[2] Statistics
[3] Yale University
> advisors(Derek)
[1] Harrison Zhou
[2] Sahand Negahban
> ?Derek
No documentation for ‘Derek’ in specified packages and libraries: you could try here.
> quit()