import re


def _remove_Abbrev(line: str) -> str:
    """
    Remove abbreviation #.#.#. #.#. #. (e.g. U.S., U.S.A., ...).

    Abbreviations often cause problems when separating sentences.
    """
    line = re.subn(r'\s\w\.\w\.\w\.\s', ' ', line)[0]
    line = re.subn(r'\s\w\.\w\.\s', ' ', line)[0]
    line = re.subn(r'\s\w\.\s', ' ', line)[0]
    return line