Question: The 71st annual Venice International Film Festival took place in Venice, Italy between which dates, "The Look of Silence" won the Silver Lion Grand Jury Prize?

full_context: Document 1: 70th Venice International Film Festival: The 70th annual Venice International Film Festival took place in Venice, Italy from 28 August to 7 September 2013. American film director William Friedkin was presented with a lifetime achievement award. Italian film director Bernardo Bertolucci was the President of the Jury. He was previously the President of the Jury at the 40th edition in 1983. "Gravity", directed by Alfonso Cuarón, was the opening film of the festival. Italian actress Eva Riccobono hosted the opening and closing nights of the festival.
Document 2: Roy Andersson: Roy Arne Lennart Andersson (born 31 March 1943) is an acclaimed Swedish film director, best known for "A Swedish Love Story" (1970) and his "Living trilogy," which includes "Songs from the Second Floor" (2000), "You, the Living" (2007) and "A Pigeon Sat on a Branch Reflecting on Existence" (2014). "Songs from the Second Floor", more than any other, cemented and exemplified his personal style – which is characterized by long takes, absurdist comedy, stiff caricaturing of Swedish culture and Felliniesque grotesque. He has spent much of his professional life working on advertisement spots, directing over 400 commercials and two short films, but only directing six feature-length films in six decades. His 2014 film "A Pigeon Sat on a Branch Reflecting on Existence" won the Golden Lion award at 71st Venice International Film Festival, making Andersson the only Swedish director and the second Scandinavian director to win the award in the history of the festival, after Danish Carl Theodor Dreyer won in 1955. Anderson is considered one of the most important living European film directors, having four films officially submitted for the Academy Award for Best Foreign Language Film as Swedish entries.
Document 3: Esther Schapira: Schapira is co-author of "The Act of Alois Brunner", and producer of two award-winning documentaries, "Drei Kugeln und ein totes Kind" ("Three bullets and a dead child") (2002), about the death of Muhammad al-Durrah in Gaza in 2000, and "Der Tag, als Theo van Gogh ermordet wurde" ("The day Theo van Gogh was murdered") (2007), about the killing in 2004 of Dutch filmmaker, Theo van Gogh. The latter won her and her co-producer, Kamil Taylan, a Prix Europa award. In 2009, she produced a second documentary about the death of al-Durrah, "Das Kind, Der Tod, und Die Wahrheit" ("The Child, the Death, and the Truth").
Document 4: A Pigeon Sat on a Branch Reflecting on Existence: A Pigeon Sat on a Branch Reflecting on Existence (Swedish: "En duva satt på en gren och funderade på tillvaron" ) is a 2014 internationally co-produced black comedy-drama film written and directed by Roy Andersson. It is the third installment in his "Living" trilogy, following "Songs from the Second Floor" (2000) and "You, the Living" (2007). It premiered at the 71st Venice International Film Festival where it was awarded the Golden Lion for Best Film. It was selected as the Swedish entry for the Best Foreign Language Film at the 88th Academy Awards but it was not nominated.
Document 5: Silence = Death: Silence = Death is a 1990 documentary film directed, written and produced by Rosa von Praunheim. The film centers on the response of some New York City artists to the AIDS epidemic. The interviewed includes East Village artist David Wojnarowicz, poet Allen Ginsberg, graffiti artist Keith Haring (who died from AIDS three months before the movie's release), Peter Kunz, Bern Boyle, and many others. It is the first part of von Praunheim and Phil Zwickler's trilogy about AIDS and activism it was followed by "Positive" (the third part, about the AIDS epidemic in Germany, was never released).
Document 6: Are You Listening!: Are You Listening! (Original title in Bengali: শুনতে কি পাও!: Shunte Ki Pao!), is a Bangladeshi documentary film written-directed by Kamar Ahmed Saimon and produced by Sara Afreen. It was the ‘Curtain-Opener’ of 55th DOK Leipzig in Germany (2012), one of the oldest documentary festivals of the world. Later the film won the ‘Grand Prix’ in the 35th Cinéma du Réel held in Paris (2013) and 'Golden Conch' in Mumbai International Film Festival (MIFF) 2014, India, as the best feature-length documentary. It was also in the ‘Official Selection’ of the 25th International Documentary Festival of Amsterdam (IDFA) in Netherlands (2012) and in the New Asian Current Competition (NAC) of 25th Yamagata International Documentary Film Festival in Japan (2013). Earlier the film was amongst the 9 selected projects invited for Editing Lab of Berlinale Talents programme in Berlin International Film Festival 2012. In a rare move as a documentary, it was released in theatre in Bangladesh on 21 February 2014 in Bashundhara Star Cineplex and successfully ran for four weeks. In 2015, the film was awarded with Bangladesh National Film Award as the Best Feature (Non-fiction) handed over by Sheikh Hasina, Prime Minister of People's Republic of Bangladesh. Written, directed and also filmed by Kamar over a span of 20 months living in a remote coastal village (Sundarbans) of Bangladesh, it is an observational cinema inspired in Cinema Vérité or Direct Cinema style, a genre almost missing until now in Bangladesh. Set against the backdrop of Aila, (a tidal surge) that swept over Bangladesh in 2009, the film celebrates the joy, dream and the resilience of the common people of Bangladesh.
Document 7: The Look of Silence: The Look of Silence (Indonesian: "Senyap" , "Silence") is a 2014 internationally co-produced documentary film directed by Joshua Oppenheimer about the Indonesian killings of 1965–66. The film is a companion piece to Oppenheimer's 2012 documentary "The Act of Killing". It was executive produced by Werner Herzog, Errol Morris, and Andre Singer. It was nominated for the Academy Award for Best Documentary Feature at the 88th Academy Awards.
Document 8: List of accolades received by The Act of Killing: "The Act of Killing" (Indonesian: "Jagal" ) is a 2012 Danish-British-Norwegian documentary film directed by Joshua Oppenheimer, Christine Cynn, and an anonymous Indonesian co-director. The film explores the social significance of the Indonesian mass killings of 1965–1966 by focusing on the perpetrators and having them produce reenactments of the killings in the style of various Hollywood genres. The film's primary subjects had been petty criminals, but came to lead a powerful death squad during the anti-communist purge which resulted in the death of an estimated 500,000–2,000,000 suspected communists, communist sympathisers, alleged leftists, and ethnic Chinese. As many of the institutions and people responsible remained in power, those who carried out the killings were never held to account and continue to hold positions of power and respect. Oppenheimer was struck by the extent to which people not only rationalised but boasted about their participation in the killings, and used the film to explore the role the events continue to play in people's lives in the present. According to Oppenheimer, it is "about a regime in which genocide has, paradoxically, been effaced and celebrated – in order to keep the survivors terrified, the public brainwashed, and the perpetrators able to live with themselves."
Document 9: 67th Venice International Film Festival: The 67th annual Venice International Film Festival held in Venice, Italy, took place from 1 to 11 September 2010. American film director and screenwriter Quentin Tarantino was head of the Jury. John Woo was awarded the Golden Lion for Lifetime Achievement prior to the start of the Festival. The opening film was Darren Aronofsky's "Black Swan".
Document 10: The Silent Historian: The Silent Historian (original title: "Het zwijgen van Loe de Jong [The Silence of Loe de Jong]") is a 2011 Dutch documentary film by Simonka de Jong, shown as part of the January 2012 New York Jewish Film Festival, presented in partnership with Jewish Museum and Film Society of Lincoln Center.
Document 11: 2014 Cannes Film Festival: The 67th Cannes Film Festival was held from 14 to 25 May 2014. New Zealand film director Jane Campion was the head of the jury for the main competition section. The Palme d'Or was awarded to the Turkish film "Winter Sleep" directed by Nuri Bilge Ceylan.
Document 12: 68th Venice International Film Festival: The 68th annual Venice International Film Festival was held in Venice, Italy between 31 August and 10 September 2011. American film director Darren Aronofsky was announced as the Head of the Jury. American actor and film director Al Pacino was presented with the Glory to the Film-maker award on 4 September, prior to the premiere of his upcoming film "Wilde Salomé". Marco Bellocchio was awarded with the Golden Lion for Lifetime Achievement in September. The festival opened with the American film "The Ides of March", directed by George Clooney.
Document 13: Silence in the Courts: Silence in the Courts (Usaviya Nihadai) (Sinhalese: "උසාවිය නිහඩයි" ) is a 2016 Sri Lankan Sinhala documentary drama film directed by Prasanna Vithanage and produced by H D Premasiri. The film runs through narration, where the role leads by Thilakshini Ratnayake. Music composed by K (Indian composer). It is the 1261st Sri Lankan film in the Sinhala cinema.
Document 14: 71st Venice International Film Festival: The 71st annual Venice International Film Festival took place in Venice, Italy between 27 August to 6 September 2014. The Swedish film "A Pigeon Sat on a Branch Reflecting on Existence" won the Golden Lion award. Joshua Oppenheimer's "The Look of Silence" won the Silver Lion Grand Jury Prize.
Document 15: Killswitch (film): Killswitch is a documentary film about the battle for control over the Internet. The movie is a collaboration between director Ali Akbarzadeh, producer Jeffrey Horn, writer Christopher Dollar and Akorn Entertainment. It premiered at the Woodstock Film Festival in October 2014, where it won the James K. Lyons Award for Best Editing of a feature documentary and then made its international debut, playing alongside "Citizenfour" at the International Documentary Film Festival Amsterdam in November 2014. In 2015, it screened on Capitol Hill, as well as film festivals on four continents (Europe, Asia, Australia, and North America). The tech world has been excited by democratic presidential candidate Lawrence Lessig's role in the film. Kathy Gill of GeekWire writes that ""Killswitch" is much more than a dry recitation of technical history. Director Ali Akbarzadeh, producer Jeff Horn, and writer Christopher Dollar created a human centered story. A large part of that connection comes from Lessig and his relationship with Swartz." Since Killswitch's recent release to a popular audience on Netflix, critics have hailed the film as one of the best documentary films to watch in 2017.
ground_truth: 27 August to 6 September 2014