Lois Lowry (born Lois Ann Hammersberg; March 20, 1937) is an American writer credited with more than thirty children's books.
 She has won two Newbery Medals, for "Number the Stars" in 1990 and "The Giver" in 1994.
 For her contribution as a children's writer, she was a finalist in 2000 and U.S. nominee again in 2004, as well as a finalist in 2016 for the biennial, international Hans Christian Andersen Award, the highest recognition available to creators of children's books.
 Her book "Gooney Bird Greene" won the 2002 Rhode Island Children's Book Award.
Natalie Savage Carlson (October 3, 1906 – September 23, 1997) was an American writer of children's books.
 For her lifetime contribution as a children's writer she was U.S. nominee for the biennial, international Hans Christian Andersen Award in 1966.
The Stranger is a children's book written in 1986 by the American author Chris Van Allsburg.
 It tells a story of a stranger with no memory of who he is or where he's from.
 He recuperates in the home of a farmer and his family during the fall season.
William Steig (November 14, 1907 – October 3, 2003) was an American cartoonist, sculptor, and, late in life, an illustrator and writer of children's books.
 Best known for the picture books "Sylvester and the Magic Pebble", "Abel's Island", and "Doctor De Soto", he was also the creator of "Shrek!
", which inspired the film series of the same name.
 He was the U.S. nominee for both of the biennial, international Hans Christian Andersen Awards, as a children's book illustrator in 1982 and a writer in 1988.
Cognitive functioning is a term referring to an individual’s ability to process to (thoughts) that should not deplete on a large scale in healthy individuals.
 It is defined as "the ability of an individual to perform the various mental activities most closely associated with learning and problem solving.
 Examples include verbal, spatial, psychomotor, and processing-speed ability."
 Cognition mainly refers to things like memory, the ability to learn new information, speech, understanding of written material.
 The brain is usually capable of learning new skills in the aforementioned areas, typically in early childhood, and of developing personal thoughts and beliefs about the world.
 Old age and disease may affect cognitive function, causing memory loss and trouble thinking of the right words while speaking or writing ("drawing a blank").
 Multiple sclerosis (MS), for example, can eventually cause memory loss, an inability to grasp new concepts or information, and depleted verbal fluency.
 Not all with the condition will experience this side effect, and most will retain their general intellect and the ability.
Irene Hunt (May 18, 1907 – May 18, 2001) was an American children's writer known best for historical novels.
 She was a runner-up for the Newbery Medal for her first book, "Across Five Aprils", and won the medal for her second, "Up a Road Slowly".
 For her contribution as a children's writer she was U.S. nominee in 1974 for the biennial, international Hans Christian Andersen Award, the highest international recognition available to creators of children's books.
Vera Baker Williams (January 28, 1927 – October 16, 2015) was an American children's writer and illustrator.
 Her best known work, "A Chair for My Mother", has won multiple awards and was featured on the children's television show "Reading Rainbow".
 For her lifetime contribution as a children's illustrator she was U.S. nominee in 2004 for the biennial, international Hans Christian Andersen Award, the highest recognition available to creators of children's books.
 Additionally, she was awarded the 2009 NSK Neustadt Prize for Children's Literature.
Chris Van Allsburg (born June 18, 1949) is an American illustrator and writer of children's books.
 He has won two Caldecott Medals for U.S. picture book illustration, for "Jumanji" (1981) and "The Polar Express" (1985), both of which he also wrote; both were later adapted as successful motion pictures.
 He was also a Caldecott runner-up in 1980 for "The Garden of Abdul Gasazi".
 For his contribution as a children's illustrator he was 1986 U.S. nominee for the biennial, international Hans Christian Andersen Award, the highest international recognition for creators of children's books.
 He received the honorary degree of Doctor of Humane Letters from the University of Michigan in April 2012.
Chris Raschka (born March 6, 1959) is an American illustrator, writer, and violist.
 He contributed to children's literature as a children's illustrator.
 He was U.S. nominee for the biennial, international Hans Christian Andersen Medal in 2012.
Albert Sidney Fleischman (March 16, 1920 – March 17, 2010), or Sid Fleischman, was an American author of children's books, screenplays, novels for adults, and nonfiction books about magic.
 His works for children are known for their humor, imagery, zesty plotting, and exploration of the byways of American history.
 He won the Newbery Medal in 1987 for "The Whipping Boy" and the Boston Globe–Horn Book Award in 1979 for "Humbug Mountain".
 For his career contribution as a children's writer he was U.S. nominee for the biennial, international Hans Christian Andersen Award in 1994.
 In 2003, the Society of Children's Book Writers and Illustrators inaugurated the Sid Fleischman Award in his honor, and made him the first recipient.
 The Award annually recognizes a writer of humorous fiction for children or young adults.
 He told his own tale in "The Abracadabra Kid: A Writer's Life" (1996).

Question: What year was the children's book, written by the 1986 U.S. nominee for the biennial about a stranger with memory loss, released?
Answer: 1986