Question: On how many different grounds were seasons chaired by Ronaldo held?
SPARQL query: SELECT DISTINCT COUNT(?uri) WHERE { ?x <http://dbpedia.org/ontology/chairman> <http://dbpedia.org/resource/Ronaldo> . ?x <http://dbpedia.org/ontology/ground> ?uri  . }
Answer: There are [8] grounds of seasons whose chairman is Ronaldo.