This task is about writing a correct answer for the reading comprehension task. Based on the information provided in a given passage, you should identify the shortest continuous text span from the passage that serves as an answer to the given question. Avoid answers that are incorrect or provides incomplete justification for the question.
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Question: Passage: In June 2014, state broadcaster China Central Television (CCTV) broadcast a news story further characterizing Windows 8 as a threat to national security. The story featured an interview with Ni Guangnan, who stated that operating systems could aggregate "sensitive user information" that could be used to "understand the conditions and activities of our national economy and society", and alleged that per documents leaked by Edward Snowden, the U.S. government had worked with Microsoft to retrieve encrypted information. Yang Min, a computer scientist at Fudan University, also stated that "the security features of Windows 8 are basically to the benefit of Microsoft, allowing them control of the users' data, and that poses a big challenge to the national strategy for information security." Microsoft denied the claims in a number of posts on the Chinese social network Sina Weibo, which stated that the company had never "assisted any government in an attack of another government or clients" or provided client data to the U.S. government, never "provided any government the authority to directly visit" or placed any backdoors in its products and services, and that it had never concealed government requests for client data. Question: What is the name of the Chinese social network?

Answer: Sina Weibo


Question: Passage: In addition to films, Turner Classic Movies also airs original content, mostly documentaries about classic movie personalities, the world of filmmaking and particularly notable films. An occasional month-long series, Race and Hollywood, showcases films by and about people of non-white races, featuring discussions of how these pictures influenced white people's image of said races, as well as how people of those races viewed themselves. Previous installments have included "Asian Images on Film" in 2008, "Native American Images on Film" in 2010, "Black Images on Film" in 2006 "Latino Images on Film" in 2009 and "Arab Images on Film" in 2011. The network aired the film series Screened Out (which explored the history and depiction of homosexuality in film) in 2007 and Religion on Film (focusing on the role of religion in cinematic works) in 2005. In 2011, TCM debuted a new series entitled AFI's Master Class: The Art of Collaboration. Question: In what year did Screened Out appear?

Answer: 2007


Question: Passage: Thirty-nine Native American tribal governments are based in Oklahoma, each holding limited powers within designated areas. While Indian reservations typical in most of the United States are not present in Oklahoma, tribal governments hold land granted during the Indian Territory era, but with limited jurisdiction and no control over state governing bodies such as municipalities and counties. Tribal governments are recognized by the United States as quasi-sovereign entities with executive, judicial, and legislative powers over tribal members and functions, but are subject to the authority of the United States Congress to revoke or withhold certain powers. The tribal governments are required to submit a constitution and any subsequent amendments to the United States Congress for approval. Question: Who must approve tribal constitutions?

Answer:
the United States Congress