Question: Who wrote the screenplay for the movie that Dana Barron played Audrey Griswold in?

Context articles: Sue Nicholls
Dana Hill
Python (film)
Hervey De Witt Griswold
Dana Barron
National Lampoon's Vacation
Frank Barron
National Lampoon's Christmas Vacation 2
National Lampoon's European Vacation
Tony Barron

Susan Frances Nicholls (born 23 November 1943) is an English actress, known for her long-running role as Audrey Roberts in the British soap opera "Coronation Street".
 Having played Audrey on a recurring basis for six years from the character's debut in 1979, she joined the cast permanently in 1985.
 She won the 2000 British Soap Award for Best Comedy Performance and the 2003 British Soap Award for Best Dramatic Performance.
Dana Hill (born Dana Lynne Goetz; May 6, 1964 – July 15, 1996) was an American actress.
 Hill is best known for having played Audrey Griswold in "National Lampoon’s European Vacation", and roles in "Shoot the Moon" and "Cross Creek".
Python is a 2000 made-for-TV horror movie directed by Richard Clabaugh.
 The film features several cult favorite actors, including William Zabka of "The Karate Kid" fame, Wil Wheaton, Casper Van Dien, Jenny McCarthy, Keith Coogan, Robert Englund, Dana Barron, David Bowe, and Sean Whalen.
Hervey De Witt Griswold was born on May 24, 1860 in Dryden, New York to Benjamin and Laura Eliza (Hurd) Griswold.
 He attended Union College in Schenectady, New York from 1881 to 1885, and then went to Union Theological Seminary in New York City from 1885 to 1888.
 During the following two years Griswold had a fellowship at Oxford and Berlin Universities.
 Griswold began his 36-year-long career as a missionary in 1890 in Jhansi, India as a representative of the Board of Foreign Missions of the Presbyterian Church.
 In 1894 Griswold became Professor of Philosophy at Forman Christian College in Lahore, India (now Pakistan), teaching English and history there as well.
 As its librarian Griswold built the Foreman Christian College Library, adding a substantial number of books on religion and philosophy to the collection.
 Griswold also served as secretary of the India Council of the Presbyterian Missions.
 In 1900 Griswold received his Ph.D. from Cornell University, based on his thesis on the Indian Philosophy known as Brahman.
 In 1910 Griswold obtained his Doctor of Divinity.
 A prolific writer, he wrote about Hinduism and other Indian religions.
 He also wrote about the Founder of the Ahmadiyya Movement, Mirza Ghulam Ahmad, at a time when Ahmad was alive, and critically analyzed his claims to be the promised Messiah and Mahdi.
Dana Barron (born April 22, 1966) is an American actress who is best known for her role as the original Audrey Griswold in the 1983 film "National Lampoon's Vacation" which she reprised in 2003's "" for NBC television.
National Lampoon's Vacation, sometimes referred to as Vacation, is a 1983 American road comedy film directed by Harold Ramis and starring Chevy Chase, Beverly D'Angelo, Randy Quaid, Dana Barron, and Anthony Michael Hall.
 John Candy, Imogene Coca, Christie Brinkley, and a young Jane Krakowski appear in supporting roles.
 The screenplay was written by John Hughes, based on his short story "Vacation '58" which appeared in "National Lampoon.
Frank John Barron (August 6, 1890 – September 18, 1964) was a Major League Baseball pitcher.
 Barron played in one game for the Washington Senators on August 19, 1914 .
National Lampoon's Christmas Vacation 2: Cousin Eddie's Island Adventure is a 2003 American made-for-television comedy film.
 It premiered December 20, 2003 on NBC and stars Randy Quaid and Miriam Flynn reprising their roles as Cousin Eddie and Catherine, along with Dana Barron reprising her role as Audrey Griswold.
 It is the sequel to the 1989 film, "National Lampoon's Christmas Vacation", although it is more of a spin-off than a direct chapter of the National Lampoon's "Vacation" film series, because Chevy Chase and Beverly D'Angelo did not appear.
European Vacation (originally given the working title Vacation '2' Europe) is a 1985 American comedy film directed by Amy Heckerling and written by John Hughes and Robert Klane based on a story by Hughes.
 The second film in National Lampoon's "Vacation" film series, it stars Chevy Chase and Beverly D'Angelo.
 Dana Hill and Jason Lively replace Dana Barron and Anthony Michael Hall as Griswald children Audrey and Rusty.
 After Hall declined to reprise his role (he decided to star in "Weird Science" instead), the producers decided to recast both children.
Anthony Dirk Barron (born August 17, 1966) is a former Major League Baseball player.
 Barron played for the Montreal Expos in 1996, and the Philadelphia Phillies in 1997.