What is <author> of <Nicholas I of Russia> ?
[]
Who is the author of Nicholas I of Russia?
SELECT DISTINCT ?p WHERE { ?p property:author resource:Nicholas_I_of_Russia }
select distinct ?answer where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject>  ?answer. ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P50> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q130734>. }
select distinct ?answer where { ?answer wdt:P50 wd:Q130734}