Question: Which industry received the most lobbying contributions?
SPARQL:
select ?industry from <http://linkedspending.aksw.org/lobbying_dataset_qy> { ?obs qb:dataSet ls:lobbying_dataset_qy. ?obs lso:lobbying_dataset_qy-industry ?industry. ?obs lso:lobbying_dataset_qy-amount ?amount. } order by desc(sum(xsd:decimal(?amount))) limit 1