5 examples after discretization
[1.4, 'low', 'Iris-setosa']
[1.5, 'low', 'Iris-setosa']
[1.2, 'low', 'Iris-setosa']
[4.7, 'high', 'Iris-versicolor']
[3.0, 'medium', 'Iris-versicolor']

