Question: What occupation do George Pearson and Florian Gallenberger have in common?

Context articles: Colonia (film)
George Pearson (filmmaker)
John Rabe (film)
Florian Gallenberger
Reveille (film)
Shadows of Time
The Fatal Hour (1937 film)
Tour de Force (film)
Quiero ser (I want to be...)
Tannishtha Chatterjee

Colonia, also known as The Colony, is a 2015 historical romantic thriller film directed by Oscar-winner Florian Gallenberger, produced by Benjamin Herrmann, written by Torsten Wenzel and Gallenberger, and starring Emma Watson, Daniel Brühl, and Michael Nyqvist.
 The film is set against the backdrop of the 1973 Chilean military coup and the real "Colonia Dignidad", a notorious cult in the South of Chile, led by German lay preacher Paul Schäfer.
 The film is an international co-production of companies in Germany, Luxembourg, and France.
George Pearson (OBE), (19 March 1875 – 6 February 1973) was a pioneering English film director, producer and screenwriter, mainly in the silent film era.
 He was born in London.
John Rabe (released in the United Kingdom as City of War: The Story of John Rabe) is a 2009 German-Chinese-French biopictorial film directed by Florian Gallenberger and starring Ulrich Tukur, Daniel Brühl and Steve Buscemi.
Florian Gallenberger (born 23 February 1972 in Munich) is a German film director.
 His film "Quiero ser (I want to be ...)" was awarded the Academy Award for Best Live Action Short Film in 2001.
Reveille is a 1924 British silent drama film directed by George Pearson.
 It follows some British soldiers during and after the First World War, though Pearson wrote in a January 1924 letter to his cast and crew:
Shadows of Time (German: Schatten der Zeit ) is a 2004 romantic Bengali language German film, shot in Calcutta, India.
 It is the first feature-length film of Academy Award winning director Florian Gallenberger, and stars Prashant Narayanan, Tannishtha Chatterjee, Irrfan Khan and Tillotama Shome in pivotal roles.
The Fatal Hour (also known as The Clock) is a 1937 British drama film directed by George Pearson and starring Edward Rigby, Moira Reed and Moore Marriott.
 It was the final film of the director George Pearson, who had been a leading figure during the silent era, and was made at Pinewood Studios.
Tour de Force (German: Hin und weg ) is a 2014 German drama film directed by Christian Zübert, produced by Florian Gallenberger and Benjamin Herrmann.
 It was screened in the Contemporary World Cinema section at the 2014 Toronto International Film Festival and in the Grand Piazzia Section of the Locarno International Film Festival.
Quiero ser (I want to be...) is a 2000 Mexican short drama film directed by Florian Gallenberger.
 It won an Academy Award in 2001 for Best Short Subject.
Tannishtha Chatterjee (born 23 November 1980) is an Indian film actress.
 She is best known in the West for her performance in the British film "Brick Lane" (2007), the film adaptation of Monica Ali's best selling novel of the same name.
 She was nominated for the British Independent Film Awards as the best actress for "Brick Lane".
 Her other notable roles have been in Academy Award-winning German director Florian Gallenberger's film "Shadows of Time", "Road, Movie" with Abhay Deol, "Dekh Indian Circus", for which she won the National Film award and Marathi film "Doctor Rakhmabai" amongst many others.