<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def list_subtitles_provider(self, provider, video, languages):
 """List subtitles with a single provider. The video and languages are checked against the provider. :param str provider: name of the provider. :param video: video to list subtitles for. :type video: :class:`~subliminal.video.Video` :param languages: languages to search for. :type languages: set of :class:`~babelfish.language.Language` :return: found subtitles. :rtype: list of :class:`~subliminal.subtitle.Subtitle` or None """

        # check video validity
        if not provider_manager[provider].plugin.check(video):
            logger.info('Skipping provider %r: not a valid video', provider)
            return []

        # check supported languages
        provider_languages = provider_manager[provider].plugin.languages & languages
        if not provider_languages:
            logger.info('Skipping provider %r: no language to search for', provider)
            return []

        # list subtitles
        logger.info('Listing subtitles with provider %r and languages %r', provider, provider_languages)
        try:
            return self[provider].list_subtitles(video, provider_languages)
        except (requests.Timeout, socket.timeout):
            logger.error('Provider %r timed out', provider)
        except:
            logger.exception('Unexpected error in provider %r', provider)