Question: The director of Back to the Future directed another movie in 1994 which was based on a book. Who was the author of the book?
Context: Forrest Gump is a 1994 American comedy-drama film based on the 1986 novel of the same name by Winston Groom.  The film was directed by Robert Zemeckis and stars Tom Hanks, Robin Wright, Gary Sinise, Mykelti Williamson, and Sally Field.  The story depicts several decades in the life of Forrest Gump, a slow-witted but kind-hearted, good-natured and athletically prodigious man from Alabama, who witnesses, and in some cases influences, some of the defining events of the latter half of the 20th century in the United States; more specifically, the period between Forrest's birth in 1944 and 1982.  The film differs substantially from Winston Groom's novel, including Gump's personality and several events that were depicted. Parampara (English: Tradition ) is a 1993 Indian Hindi romantic drama movie starring Aamir Khan, Sunil Dutt, Vinod Khanna, Ashwini Bhave, Ramya Krishna, Saif Ali Khan, Raveena Tandon, Neelam Kothari and Anupam Kher.  The film is produced by Firoz A. Nadiadwala and directed by Yash Chopra.  Aditya Chopra wrote the screenplay for the film.  The film was supposed to be Saif Ali Khan's debut however "Aashiq Awara" 1992 movie was his debut movie.The film was panned by the critics for its weak storyline, weak music and bad direction by Yash Chopra.  It was a commercial flop.  The movie was shot in the famous Indian boarding school, Mayo College.  The movie was coincidentally same story as another movie Kshatriya (film) which was released before this movie.  Both the movies were multistarers but failed to create business at the box office.  Sunil Dutt, Vinod Khanna and Raveena Tandon were the only actors who featured in both the movies. Simon J. Smith is an English director, animator, visual effects artist and occasional voice actor, best known for his work at DreamWorks Animation.  Smith came to PDI/DreamWorks in 1997 as head of layout for the company's feature film division.  A CG animation veteran with nearly 25 years of experience, Smith supervised the layout department on PDI/DreamWorks' first animated feature "Antz", serving as the head of layout in "Shrek".  He then directed the Universal Studios Theatre experience "Shrek 4-D", followed by the short "Far Far Away Idol".  His first feature film as a director was in 2007, with "Bee Movie" .  He then directed another DVD short, "", before co-helming, with Eric Darnell, the comedy/spy action spin-off from the "Madagascar" series, "Penguins of Madagascar". Sapne Saajan Ke is 1992 Hindi language movie directed by Lawrence D'Souza and starring Karishma Kapoor, Rahul Roy, and Jackie Shroff.  The movie was a collaboration of director Lawrence D'Souza and producer Sudhakar Bokade after their blockbuster movie Saajan.  However, the movie was average earner at box office.  Actor Aditya Pancholi used his voice to promote the movie as another movie after super success of movie Saajan Ek Khiladi Ek Haseena, released in 2005, is an Indian Hindi erotic crime-thriller film directed by Suparn Verma.  It is a remake of the 2003 Hollywood crime drama movie Confidence.  This movie was another movie in which the father-son duo Fardeen Khan and Feroz Khan had worked.  Before this they have worked in 2003 movie Janasheen.  This movie was 1st lead role for actress Koena Mitra who was seen in small roles. Robert Lee Zemeckis (born May 14, 1952) is an American filmmaker and screenwriter frequently credited as an innovator in visual effects.  Credited as "one of the greatest visual storytellers in filmmaking", he first came to public attention in the 1980s as the director of "Romancing the Stone" (1984) and the science-fiction comedy "Back to the Future" film trilogy, as well as the live-action/animated comedy "Who Framed Roger Rabbit" (1988).  In the 1990s he diversified into more dramatic fare, including 1994's "Forrest Gump", for which he won an Academy Award for Best Director.  The film itself won Best Picture.  The movies he has directed have ranged across a wide variety of genres, for both adults and families. Kapıcılar Kralı, –literally meaning "King of Housekeepers"–, is a 1976 Turkish comedy film featuring Kemal Sunal, Sevda Ferdağ, Bilge Zobu and Şevket Altuğ, produced by Arif and Abdurrahman Keskiner and, directed by Zeki Ökten.  The movie is the third collaboration of Ökten and Sunal, following "Hanzo" and "Şaşkın Damat", both shot in 1975.  Kapıcılar Kralı is considered as one of the most memorable motion pictures of the career of Kemal Sunal.  Along with Çöpçüler Kralı another movie of Sunal also directed by Zeki Ökten, Kapıcılar Kralı is also featured in the book "100 Yılın 100 Türk Filmi", written by Atilla Dorsay, Turkish film critic. Amy & Isabelle is a 2001 made-for-television movie produced through Oprah Winfrey's Harpo Films as part of her "Oprah Winfrey Presents" film line.  It was directed by Lloyd Kramer, who had previously directed another film under the "Oprah Winfrey Presents" banner, "".  The book is based on the 1998 Elizabeth Strout book "Amy and Isabelle" and stars Elisabeth Shue and Hanna Hall as Isabelle and her daughter Amy. Pyaar Ke Side Effects (Hindi: प्यार के साइड इफेक्ट्स) and (English: The Side Effects of Love ) is a 2006 Indian Hindi romantic comedy film.  It was produced under the banner of Pritish Nandy communications and was written and directed by first time director Saket Chaudhary.  Mallika Sherawat and Rahul Bose played the lead cast.  The film is a romantic comedy, and portrays the intricacies of a modern relationship.  The film explores the theme of 'commitment phobia' in a captivating manner, an interesting, witty take on men-women relationships.  After the success of this movie the lead pair were repeated in another movie Maan Gaye Mughal-e-Azam however that movie couldn't match the success of this movie.  A sequel, "Shaadi Ke Side Effects", was released in 2014 with Vidya Balan and Farhan Akhtar in the lead roles. Hector is a Belgian comedy-drama film, directed by Stijn Coninx starring Urbanus and Sylvia Millecam.  The movie was released in 1987 and was the most successful Flemish movie regarding amount of visitors in Belgian movie theatres until 1990.  It was beaten by "Koko Flanel", another movie with Stijn Coninx as director and Urbanus as main actor.
Answer: Winston Groom