Question: Which clients received lobbying contributions of more than 50000000 $?
SPARQL:
select ?client sum(xsd:decimal(?amount)) as ?sum from <http://linkedspending.aksw.org/lobbying_dataset_qy> { ?obs qb:dataSet ls:lobbying_dataset_qy. ?obs lso:lobbying_dataset_qy-client ?client. ?obs lso:lobbying_dataset_qy-amount ?amount. } group by ?client having sum(xsd:decimal(?amount))>50000000