Question: In what year was the American author of Mistborn: The Hero of Ages born?
Context: Mistborn is a series of epic fantasy novels written by American author Brandon Sanderson and published by Tor Books.  The first series, published between 2006 and 2008, consists of "", "", and "". Mistborn: The Final Empire, also known simply as Mistborn or The Final Empire, is a fantasy novel written by American author Brandon Sanderson.  It was published on July 17, 2006 by Tor Books and is the first novel in the "Mistborn trilogy", followed by "" in 2007 and "" in 2008. Mistborn: The Bands of Mourning is a high fantasy novel written by American author Brandon Sanderson.  It was published on January 26, 2016 by Tor Books and is the third book in the "Wax and Wayne" series and sixth in the "Mistborn" series.  It is preceded by "" in 2015 and is scheduled to be followed by "" in 2019. Brandon Sanderson (born December 19, 1975) is an American fantasy and science fiction writer.  He is best known for the Cosmere universe, in which all his adult fantasy books most notably the "Mistborn" series and "The Stormlight Archive", are set; and his work in finishing Robert Jordan's epic fantasy series "The Wheel of Time". Mistborn: Secret History is a fantasy novella by American author Brandon Sanderson, written as a companion story to the original trilogy of the Mistborn series.  It was published as an ebook-only novella by "Dragonsteel Entertainment LLC", a company owned by the author, on 30 January 2016. Mistborn: The Well of Ascension is a fantasy novel written by American author Brandon Sanderson.  It was published on August 21, 2007 by Tor Books and is the second novel in the "Mistborn trilogy".  It is preceded by "" in 2006 and followed by "" in 2008. Mistborn: The Alloy of Law is a high fantasy novel written by American author Brandon Sanderson.  It was published on November 8, 2011 by Tor Books and is the first book in the "Wax and Wayne" series and fourth in the "Mistborn" series.  It is preceded by "" from the "Mistborn Original Trilogy" in 2008 and followed by "" in 2015. The Mistborn Adventure Game is a pen and paper role playing game that was published in 2011 by Crafty Games and is a licensed release based on American author Brandon Sanderson's "Mistborn" novel series.  Sanderson was involved in the game's creation and the game is set in Scadrial; the World created by the "Mistborn" series.  The initial "Mistborn Adventure Game" book was released on December 16, 2011.  Since 2011, two supplementary material books have been published.  The first supplement was released March 2014 and is called "Terris: Wrought of Copper".  The second supplement was released on August 3, 2014 and is called "Alloy of Law", not to be confused with the fourth "Mistborn" book called "". Mistborn: The Hero of Ages is a fantasy novel written by American author Brandon Sanderson.  It was published on October 14, 2008 by Tor Books and is the third novel in the "Mistborn" trilogy.  It is preceded by "" in 2007 and followed by "" in the "Mistborn: Era 2" series, "Wax and Wayne" in 2011. Mistborn: Shadows of Self is a high fantasy novel written by American author Brandon Sanderson.  It was published on October 6, 2015 by Tor Books and is the second book in the "Wax and Wayne" series and fifth in the "Mistborn" series.  It is preceded by "" in 2011 and followed by "" in 2016.
Answer: 1975