@staticmethod
def json_to_caption(subtitles_json):
    """Loops through the subtitles of the json response, concatenates all
        lines and returns all subtitles combined as a complete caption.

        Parameters
        ----------
        subtitles_json: dict
            The json response containing the subtitles of
            the screencap.

        Returns
        -------
        caption: str
            The subtitles combined as a complete caption."""
    caption = ''
    for quote in subtitles_json['Subtitles']:
        caption += quote['Content'] + ' '
    return caption
