Question: How much is the total amount of statuatory transfers in Nigerias proposed budget of 2013?
SPARQL:
 select sum(xsd:decimal(?amount)) as ?sum from <http://linkedspending.aksw.org/propbudg13> { ?obs qb:dataSet ls:propbudg13. ?obs lso:propbudg13-from <https://openspending.org/propbudg13/from/statutory-transfers>. ?obs lso:propbudg13-amount ?amount. }