Question: Which of Worldviews Entertainment's films was based on a novel by Tom Rob Smith?

Context paragraphs:
London Spy: London Spy is a British-American five-part drama television serial created and written by Tom Rob Smith that aired on BBC Two from 9 November until 7 December 2015.

Smith &amp; Mighty: Smith & Mighty are a trip hop group from Bristol, consisting of Rob Smith and Ray Mighty.  Their first releases, in the late 1980s, were breakbeat covers of "Anyone Who Had a Heart" and "Walk On By".  They went on to produce "Wishing on a Star" for Fresh Four and Massive Attack's first single, "Any Love".

Child 44: Child 44 (published in 2008) is a thriller novel by British writer Tom Rob Smith.  This is the first novel in a trilogy featuring former MGB Agent Leo Demidov, who investigates a series of gruesome child murders in Joseph Stalin's Soviet Union.

Rob Smith (journalist): Rob Smith is an English television presenter, best known for being a co-anchor on the BBC South East Today news programme.

The Secret Speech (novel): The Secret Speech is the second novel in a trilogy by British author Tom Rob Smith; it was released in April 2009.  The book features a repeat appearance of Leo Stepanovich Demidov, the protagonist of Smith's first book, "Child 44" (2008).  "The Secret Speech" is a further exploration of the Soviet Union Joseph Stalin created.  The third novel in the trilogy, "Agent 6", was published in 2011.

Robert Smith (Canadian actor): Robert Norman Smith (born 1966) is a Canadian actor who was known as Rob Smith in his earlier works.

Worldview Entertainment: Worldview Entertainment is an American independent motion picture company that finances and produces theatrical quality feature films for worldwide distribution.  The company was founded in 2007 and is based in New York City.  Worldview has produced films including "Child 44", "Birdman", "Blood Ties", "The Green Inferno", and "Killer Joe".

Child 44 (film): Child 44 is a 2015 mystery thriller film directed by Daniel Espinosa, written by Richard Price, and based on Tom Rob Smith's 2008 novel of the same name.  The film stars an ensemble cast featuring Tom Hardy, Gary Oldman, Noomi Rapace, Joel Kinnaman, Paddy Considine, Jason Clarke, and Vincent Cassel.  It was released on 17 April 2015.  Both the novel and the film are very loosely based on the case of Soviet serial killer Andrei Chikatilo, who had been portrayed in the earlier film "Citizen X".

Live in New York &amp; Dublin: Live in New York & Dublin is a live EP released by the Irish musician Rob Smith on 9 June 2011.  It featured acoustic live performances in various venues in both New York City, United States and Dublin, Ireland.

The Farm (Smith novel): The Farm (2014) is a psychological thriller novel by Tom Rob Smith.  Set in London and Sweden, it is Smith's fourth published work and his first standalone novel.

Supporting paragraphs: Worldview Entertainment Child 44 (film)
Answer: Child 44