import re


def remove_extra_spaces(raw_sentence):
    """
    This method removes more than one continuous spaces and reduces to only one space.

    :argument:
        :param raw_sentence: String
    :returns:
        clean_str: String which does not contain more than 1 continuous white spaces.
    """
    clean_str = re.sub(r"\s\s+", r" ", raw_sentence)
    return clean_str