def get_file_clusters(self, date):
        """Retrieves file similarity clusters for a given time frame.

        Args:
            date: the specific date for which we want the clustering details.
            Example: 'date': '2013-09-10'
        Returns:
            A dict with the VT report.
        """
        api_name = 'virustotal-file-clusters'

        (all_responses, resources) = self._bulk_cache_lookup(api_name, date)
        response = self._request_reports("date", date, 'file/clusters')
        self._extract_response_chunks(all_responses, response, api_name)

        return all_responses