SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/The_Frost_King> <http://dbpedia.org/ontology/author> ?uri }
Who wrote the frost king?
SELECT DISTINCT ?z WHERE { resource:The_Frost_King property:author ?z }
Helen Keller
[Helen Keller] is the author of The Frost King .
[Helen Keller] is the author of The Frost King.
The author of The Frost King  is [Helen Keller].
The writer of The Frost King is [Helen Keller].