Question: In which year did the City of Oakland have the highest total expenditure budget?
SPARQL:
select year(?year) from <http://linkedspending.aksw.org/oakland-adopted-budget-fy-2011-13-expenditures> { ?obs qb:dataSet ls:oakland-adopted-budget-fy-2011-13-expenditures. ?obs lso:oakland-adopted-budget-fy-2011-13-expenditures-amount ?amount. ?obs lso:refYear ?year. } order by desc(sum(xsd:decimal(?amount))) limit 1