def split(Instances):
    """'' Split the 4 attibutes, collect the data of the ith attributs, i=0,1,2,3
        Return a list like [['0.2', 'Iris-setosa'], ['0.2', 'Iris-setosa'],...]"""
    log = []
    for i in range(len(Instances)):
        log.append([Instances.iloc[i][0], Instances.iloc[i][1]])
    return log
