List common systems which are developed by Google Videos and written by Google Web Toolkit?
SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/Google_Videos> <http://dbpedia.org/property/developer> ?uri. <http://dbpedia.org/resource/Google_Web_Toolkit> <http://dbpedia.org/ontology/author> ?uri}
Google_Videos Google_Web_Toolkit