SELECT DISTINCT COUNT(?uri) WHERE { ?x <http://dbpedia.org/property/branch> <http://dbpedia.org/resource/Continental_Army> . ?x <http://dbpedia.org/property/president> ?uri . }
For how many different presidents have people in the Continental Army served?
SELECT DISTINCT COUNT ( ?b ) WHERE { ?o property:president ?b . . ?o property:branch resource:Continental_Army }
17
There are [17] Presidents to which the people in the Continental Army have served.
There are [17] people who served in the Continental Army.
There are [17] President are there, of the office holders whose branch is the organisation .
There are [17] office holders, of which the organization is an affiliate.