Question: How many bacterias have taxonomy as Bacillales and domain as Bacteria? 
SPARQL query:
PREFIX prop: <http://dbpedia.org/property/>
PREFIX onto: <http://dbpedia.org/ontology/>
 SELECT DISTINCT COUNT(?uri) WHERE {?uri onto:order <http://dbpedia.org/resource/Bacillales> . ?uri prop:domain <http://dbpedia.org/resource/Bacteria> }