What is {river source} of {tributary} of {Yangtze} ?
What is the source river for the tributary of yangtze?
who river source of tributary of yangtze ?
SELECT ?z WHERE { resource:Yangtze property:tributary ?q . ?q property:origin_of_the_watercourse ?z }
SELECT ?answer WHERE { ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q5413> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P974>. ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?X . ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?X. ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P885> . ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?answer . }
SELECT ?answer WHERE { wd:Q5413 wdt:P974 ?X . ?X wdt:P885 ?answer}
Tai Lake Bayan Har Mountains Tongtian River