iris.txt and cleared_machines are from Lichman, M. (2013). UCI Machine Learning Repository [http://archive.ics.uci.edu/ml]. Irvine, CA: University of California, School of Information and Computer Science. Read more about machine dataset http://archive.ics.uci.edu/ml/machine-learning-databases/cpu-performance/machine.names

titanic dataset has next columns survived pclass sex age sibsp parch fare