Question: Did Mary Harron and Bob Clark work in the same industry?

Context articles: Catherine Black (actress)
John Harron
Children Shouldn't Play with Dead Things
The Moth Diaries (film)
Randall Woolf
The Notorious Bettie Page
Mary Harron
Arena (TV series)
Alias Grace (miniseries)
Bob Clark

Catherine Black is a Canadian film, TV and stage actress.
 Black is best known for starring opposite Peter Weller in one episode of the science fiction Showtime series, "Odyssey 5", playing Vanden, opposite Christian Bale, in the 2000 cult thriller "American Psycho", directed by Mary Harron, and starring with Crispin Glover in the 2009 period drama, "The Donner Party".
 Black won a Best Actress award at the 2014 Madrid International FIlm Festival for her performance in "De Puta Madre A Love Story", a short film that she also wrote and directed.
 The short film was also nominated for a Best Story and Best Short Film.
John Harron (March 31, 1903 – November 24, 1939) was an American actor.
 He appeared in 167 films between 1918 and 1940.
 Born in New York, New York, he was the brother of actor Robert Harron and of actress Mary Harron.
 Harron died in Seattle, Washington from spinal meningitis.
Children Shouldn't Play with Dead Things (also known as "Revenge of the Living Dead", "Things From the Dead", and "Zreaks") is a 1972 comedic horror film directed by Bob Clark.
 It later became a cult classic.
 This low-budget zombie film is the third film of director Bob Clark, who later became famous for directing the films "Black Christmas", "A Christmas Story", and "Porky's".
The Moth Diaries is a 2011 Irish-Canadian horror film directed by Mary Harron and based on a 2002 novel "The Moth Diaries" by Rachel Klein.
 The film stars Lily Cole, Sarah Gadon, Sarah Bolger, Judy Parfitt, and Scott Speedman.
Randall Woolf (born August 23, 1959) is an American composer known for his diverse contemporary works for chamber orchestra, chamber ensembles, and solo players, often combined with digital audio, turntables and video.
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 He studied composition privately with David Del Tredici and Joseph Maneri, and at Harvard, where he earned a Ph.D.
 He is a member of the Common Sense Composers Collective.
 He is composer-mentor for the Brooklyn Philharmonic.
 In 1997 he composed a new ballet of “Where the Wild Things Are”, in collaboration with Maurice Sendak and Septime Webre.
 He has created 3 pieces for video and live instruments with directors Mary Harron (director of “American Psycho”) and John C. Walsh.
 He works frequently with John Cale, notably on his score to “American Psycho”.
 He re-created 4 songs of Nico for Cale’s tribute concert “On The Borderline”, sung by Peter Murphy, Lisa Gerrard, Sparklehorse, Stephin Merritt, Peaches, and Meshell Ndegeocello.
 He has arranged over 40 of Cale’s song for orchestra, including the entire "Paris 1919" album, performed at the Brooklyn Academy of Music in January, 2013, songs from "The Velvet Underground And Nico", and "Music For A New Society".
 His works have been performed by Kathleen Supové, Jennifer Choi, Timothy Fain, Mary Rowell, Todd Reynolds, Ethel, conductor and flutist Ransom Wilson, Tara O’Connor, Lindsey Goodman, the Brooklyn Philharmonic, Kronos Quartet, Turnmusic, Fulcrum Point, Pittsburgh New Music Ensemble, Sonic Generator, Bang On A Can/SPIT Orchestra, American Composers Orchestra, NakedEye Ensemble, and others.
The Notorious Bettie Page is a 2005 biographical film directed by Mary Harron.
 The screenplay by Harron and Guinevere Turner focuses on 1950s pinup and bondage model Bettie Page.
Mary Harron (born January 12, 1953) is a Canadian filmmaker and screenwriter best known for her socially-conscious independent films like "I Shot Andy Warhol", "American Psycho" and "The Notorious Bettie Page".
Arena is a British television documentary series, made and broadcast by the BBC since 1 October 1975.
 Voted by TV executives in "Broadcast" magazine as one of the top 50 most influential programmes of all time, it has produced over six hundred episodes directed by, among others, Frederick Baker, Jana Boková, Jonathan Demme, Nigel Finch, Mary Harron, Vikram Jayanti, Vivian Kubrick, Paul Lee, Adam Low, James Marsh, Leslie Megahey, Volker Schlondorff, Martin Scorsese, Julian Temple, Anthony Wall, Leslie Woodhead, and Alan Yentob.
Alias Grace is a Canadian-American television miniseries directed by Mary Harron and starring Sarah Gadon.
 It is based on the 1996 novel of the same name by Margaret Atwood and adapted by Sarah Polley.
 It will air on CBC Television in Canada and will stream on Netflix globally.
 The series will consist of six episodes.
 It is scheduled to be released on CBC on September 25, 2017, and on Netflix on November 3, 2017.
Benjamin "Bob" Clark (August 5, 1939 – April 4, 2007) was an American actor, director, screenwriter and producer best known for directing and writing the script with Jean Shepherd to the 1983 Christmas film "A Christmas Story".
 Although he worked primarily in the United States, from 1973 to 1983 he worked in Canada and was responsible for some of the most successful films in Canadian film history such as "Black Christmas" (1974), "Murder by Decree" (1979), "Tribute" (1980), and "Porky's" (1982).