Question: Who has written more screenplays, David Siegel or Ron Underwood?

Context paragraphs:
Ron Underwood: Ronald Brian "Ron" Underwood (born November 6, 1953) is an American film director, producer and television director.

Tremors (film): Tremors is a 1990 American monster film directed by Ron Underwood, produced by Gale Anne Hurd, Brent Maddock, and S. S. Wilson, and written by Maddock, Wilson, and Underwood.  "Tremors" was released by Universal Pictures and stars Kevin Bacon, Fred Ward, Finn Carter, Michael Gross, and Reba McEntire.

AMS Euler: AMS Euler is an upright cursive typeface, commissioned by the American Mathematical Society (AMS) and designed and created by Hermann Zapf with the assistance of Donald Knuth and his Stanford graduate students.  It tries to emulate a mathematician's style of handwriting mathematical entities on a blackboard, which is upright rather than italic.  It blends very well with other typefaces made by Hermann Zapf, such as Palatino, Aldus and Melior, but very badly with the default TeX font Computer Modern.  All the alphabets were implemented with the computer-assisted design system Metafont developed by Knuth.  Zapf designed and drew the Euler alphabets in 1980–81 and provided critique and advice of digital proofs in 1983 and later.  The typeface family is copyright by American Mathematical Society, 1983.  Euler Metafont development was done by Stanford computer science and/or digital typography students; first Scott Kim, then Carol Twombly and Daniel Mills, and finally David Siegel, all assisted by John Hobby.  Siegel finished the Metafont Euler digitization project as his M.S. thesis in 1985.

Versailles house: Versailles is a 90,000 square-foot house belonging to Westgate Resorts founder David Siegel and his wife Jackie Siegel — and under construction at 6121 Kirkstone Lane, Windermere, Florida, in the gated community of Lake Butler Sound in Orange County.  USA.  Named and modeled after the Palace of Versailles in France, the completed project will be one of the largest single-family homes in the United States.

David Siegel (executive): David Siegel ( ) is the current CEO of Investopedia.  In the past, he served as the President of SeekingAlpha and a Senior Vice President for 1-800 Flowers.  Siegel has earned both a BA in Philosophy, Politics and Economics and an MBA in Finance and Marketing, both degrees from the University of Pennsylvania.

Stealing Sinatra: Stealing Sinatra is a 2003 film directed by Ron Underwood.  It stars David Arquette and William H. Macy.  Macy was nominated for an Emmy Award for his performance.

Snow Drifts: "Snow Drifts" is the twenty-first episode of the third season of the American fantasy drama series "Once Upon a Time", and the show's 65th episode overall, which aired on May 11, 2014.  The episode serves as the first of a two part episode for the third season finale and was written by David H. Goodman & Robert Hull and directed by Ron Underwood.

David Siegel (screenwriter): David Siegel is an American film director, screenwriter and producer, and part of a long-standing writing-directing-producing team with filmmaker Scott McGehee.

Donald Peterman: Donald William Peterman, A.S.C. (January 3, 1932 – February 5, 2011) was an American cinematographer whose numerous feature film credits included "Flashdance", "Men in Black", "Cocoon" and "".  He was a regular collaborator of directors like Ron Howard, Barry Sonnenfeld, and Ron Underwood.  He was a two-time Academy Award nominee and a member of the Academy of Motion Picture Arts and Sciences and the American Society of Cinematographers since 1984.

The Queen of Versailles: The Queen of Versailles is a 2012 American documentary film by Lauren Greenfield.  The film depicts Jackie Siegel and David Siegel, owners of Westgate Resorts, and their family as they build their private residence — "Versailles", one of the largest and most expensive single-family houses in the United States — and the crisis they face as the U.S. economy declines.

Supporting paragraphs: Ron Underwood David Siegel (screenwriter)
Answer: David Siegel