Question: How many directorates does the Newcastle city council have?
SPARQL:
 select count(distinct(?directorate)) as ?result from <http://linkedspending.aksw.org/newcastle-city-council-payments-over-500> { ?obs qb:dataSet ls:newcastle-city-council-payments-over-500. ?obs lso:newcastle-city-council-payments-over-500-from ?directorate. }