Question: How many different kinds of software have been released under the GNU General Public License?
SPARQL query: SELECT DISTINCT COUNT(?uri) WHERE { ?x <http://dbpedia.org/property/license> <http://dbpedia.org/resource/GNU_General_Public_License> . ?x <http://dbpedia.org/ontology/genre> ?uri  . }
Answer: There are [1831] genres of software licensed by GNU General Public License.