def calc_set_intersection(obj, target):
    a = set(obj.split())
    b = set(target.split())
    return ((len(a.intersection(b)) * 1.0) / (len(a) * 1.0))
def calc_set_intersection(obj, target):
    a = set(obj.split())
    b = set(target.split())
    return ((len(a.intersection(b)) * 1.0) / (len(a) * 1.0))