Question: Are Murray Grigor and Leslie H. Martinson both Scottish directors?

full_context: Document 1: Derik Murray: Derik Murray is the founder of Network Entertainment. He began his career as an advertising photographer and television commercial director before switching his attention to television, film and publishing projects. His credits include producing the Academy Award shortlisted "Facing Ali", a feature documentary made with Lionsgate Entertainment, and "I Am Bruce Lee", which had its US television premiere on Spike TV where it garnered the highest ratings for a documentary in the network’s history. Derik also produced "I Am Steve McQueen", produced and co-directed "I Am Evel Knievel", "I Am Chris Farley" (which surpassed "I Am Bruce Lee" ratings for Spike TV), "Johnny Cash - American Rebel" for CMT, and "The Cowboy" for Discovery. Derik recently produced and directed the feature documentary "I Am JFK Jr." and is executive producing and co-directing the seven-part series "Facing" for National Geographic. In 2017 he produced the feature film "I Am Heath Ledger".
Document 2: Jerry Belson: Jerry Belson (July 8, 1938 – October 10, 2006) was a writer, director, and producer of Hollywood films for over forty years.
Document 3: And Millions Will Die: ...And Millions Will Die! (aka "And Millions Die") is a 1973 Australian television film shot in Hong Kong directed by Leslie H. Martinson.
Document 4: Alex Segal: Alex Segal (July 1, 1915 – August 22, 1977) was an American television director, television producer and film director.
Document 5: Scott Grieger: Scott Grieger (born 1946) is an American artist based in Los Angeles. He attended Chouinard Art Institute in Los Angeles, California and received a B.F.A. from California State University, Northridge in 1971. His work has been exhibited internationally for over 40 years. He is a Professor and Program Director of Painting in the Fine Arts program at Otis College of Art and Design.
Document 6: Leslie H. Martinson: Leslie Herbert "Les" Martinson (January 16, 1915 – September 3, 2016) was an American television and film director.
Document 7: Greg Grainger: Greg Grainger is an Australian film-maker, TV presenter, producer, director, journalist, newsreader, station manager, news director, political correspondent and documentary maker. His works spans both high-definition travel and adventure documentaries, to wildlife programs. He has numerous distinctions including being a Logie Award winner for "Best News Coverage" (9 Network) and 2011 IAB Awards "Best of Show".
Document 8: Delbert Mann: Delbert Martin Mann Jr. (January 30, 1920 – November 11, 2007) was an American television and film director. He won the Academy Award for Best Director for the film "Marty" (1955), adapted from a 1953 teleplay of the same name which he had also directed. From 1967 to 1971, he was president of the Directors Guild of America. In 2002, he received the DGA's honorary life member award. Mann was credited to have "helped bring TV techniques to the film world."
Document 9: Lionel C. Martin: Lionel C. Martin is a music video director, film director and VJ from Queens, New York. While he is known primarily as a music video director, he has also directed the films "Def Jam's How to Be a Player" and "Longshot".
Document 10: Abingdon Film Unit: The Abingdon Film Unit (known as the AFU) is a small organisation based at Abingdon School in Oxfordshire, England that enables secondary school pupils between the ages of 13 and 18 to make their own short documentary or animated films under the guidance of a team of industry professionals. The AFU was formed in 2003 by renowned British documentary maker Michael Grigsby and the school's Head of Drama, Jeremy Taylor. They led the Unit together until Grigsby's death at the age of 76 in March 2013. By then, they had assembled a formidable team of tutors; Jonas Mortensen (cinematography), Mikkel Eriksen and Larry Sider (sound design), Nikolaj Larsen and Arvid Eriksson (editing), Colin O'Toole, Duncan Pickstock and Rebekah Tolley (direction), and animators Joanna Harrison and Geoff Dunbar. The Unit has so far produced around a hundred short films, many of which have won prizes or received screenings at festivals in the UK and abroad. Most of the films can be viewed at the Unit's official website (http://www.abingdonfilmunit.com). The influence of Grigsby's distinctive philosophy and aesthetic - using the medium of film "to give voice to the voiceless", explore "the poetry of the everyday" and allow audiences time and space in which to make their own judgements about the material - are often discernible in AFU documentaries, whilst AFU animations celebrate a hand-drawn or hand-made approach.
Document 11: Murray Grigor: William Alexander Murray Grigor OBE (born 1939) is a Scottish film maker, writer and exhibition curator who has served as director of the Edinburgh International Film Festival. He has made over 50 films with a focus on arts and architecture documentaries.
Document 12: Bill Marshall (producer): Bill Marshall, CM, (1939 – January 1, 2017) was a Scottish-born Canadian filmmaker, film producer and theater producer. In 1976, Marshall co-founded the Toronto Festival of Festivals, now known as the Toronto International Film Festival (TIFF), with Dusty Cohl and Henk Van der Kolk. The first Festival of Festivals drew just 5,000 attendees to view 127 films in October 1976. The Toronto Film Festival is now one of the largest film festivals in the world and established Toronto as a major hub for film and cinema. Marshall has been called "a pioneer in the Canadian film industry" for his role in both establishing the festival, as well as expanding the Canadian film-making into a major, nationwide artistic and business sector.
Document 13: Richard Lester: Richard Lester (born Richard Lester Liebman; January 19, 1932) is an American film director based in Britain. Lester is known for his work with the Beatles in the 1960s and his work on the "Superman" film series in the 1980s.
Document 14: Murray Pomerance: Murray Pomerance is a Canadian film scholar, author, and professor teaching in the Department of Sociology at Ryerson University and in the Joint Program in Communication and Culture at Ryerson University and York University.
Document 15: John Grierson: John Grierson CBE (26 April 1898 – 19 February 1972) was a pioneering Scottish documentary maker, often considered the father of British and Canadian documentary film. In 1926, Grierson coined the term "documentary" in a review of Robert Flaherty's "Moana".
ground_truth: no