What is the {lake inflows} and the {drainage basin} of {Hoover_Dam} ?
What lake is formed by Hoover Dam, and which river does it drain into?
What is the lake inflow and the drainage basin of the Hoover Dam?
SELECT ?a ?i WHERE { resource:Hoover_Dam property:drainage_basin ?i . resource:Hoover_Dam property:inflows ?a }
 SELECT ?ans_1 ?ans_2 WHERE { ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q172822> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P200> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?ans_1. ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q172822> . ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P4614> . ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?ans_2. } 
SELECT ?ans_1 ?ans_2 WHERE { wd:Q172822 wdt:P200 ?ans_1 . wd:Q172822 wdt:P4614 ?ans_2 }
Colorado River Colorado River basin