Question: What was the highest amount for materials and supplies used in Cameroon in 2008?
SPARQL:
select max(xsd:decimal(?amount)) as ?sum from <http://linkedspending.aksw.org/cameroon_visualisation> { ?obs qb:dataSet ls:cameroon_visualisation. ?obs lso:cameroon_visualisation-head_account <https://openspending.org/cameroon_visualisation/head_account/610-xxx>. ?obs lso:cameroon_visualisation-amount ?amount. ?obs lso:refYear ?year. filter(year(?year)=2008). }