petal width<0.800: Iris-setosa (100.00%)
petal width>=0.800
|    petal width>=1.750: Iris-virginica (97.83%)
|    petal width<1.750
|    |    petal length<5.350: Iris-versicolor (94.23%)
|    |    petal length>=5.350: Iris-virginica (100.00%)

