SELECT DISTINCT ?uri WHERE {?uri <http://dbpedia.org/property/rank> <http://dbpedia.org/resource/Colonel_(United_States)> . }
Who are some US colonels?
SELECT DISTINCT ?m WHERE { ?m property:rank resource:Colonel_(_United_States) . }
answer
The people ranked as Colonel are [answer].
People who are classified as colonels are [the answer].