Count the total number of mammals whose phylum is Chordate and order (taxonomy) is Diprotodontia?
SELECT DISTINCT COUNT(?uri) WHERE {?uri <http://dbpedia.org/ontology/phylum> <http://dbpedia.org/resource/Chordate> . ?uri <http://dbpedia.org/ontology/order> <http://dbpedia.org/resource/Diprotodontia> }
Chordate Diprotodontia