Question: How many maintainers are there of the bridges that can carry motor vehicles over them?
SPARQL query: SELECT DISTINCT COUNT(?uri) WHERE { ?x <http://dbpedia.org/property/carries> <http://dbpedia.org/resource/Motor_vehicle> . ?x <http://dbpedia.org/ontology/maintainedBy> ?uri  . }
Answer: There are [87] maintainers of bridges that can carry motor vehicles.