def list_b_in_list_a(list_a, list_b):
    """ list_b_in_list_a(list_a, list_b)
    Whether list_b is subset of list_a

    Parameters:
        list_a: list
        list_b: list
    Return: 
        flag: bool
    """
    return set(list_b) <= set(list_a)