import re


def no_to_be(f, e):
    """
    Removes  'to' or 'be' or both of those tokens in the beginning of phrases
    For example:
       be known -> known
       to drink -> drink
    :param f:
    :param e:
    :return:
    """
    e_ = re.sub('^(to\s)?(be\s)?', '', e)
    if e != e_:
        print('> NO_TO_BE: %s -> %s' % (e, e_))
    return [(f, e_)] if e_ else []