What is the {lake inflows} and the {reservoir created} of {Hoover_Dam} ?
What is Hoover Dam's Lake inflow and reservoir?
What is the Lake inflows and the reservoir created of Hoover_Dam ?
SELECT ?f ?e WHERE { resource:Hoover_Dam property:inflows ?f . resource:Hoover_Dam property:reservoir_created ?e }
 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/P4661> . ?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:P4661 ?ans_2 }
Colorado River Lake Mead