Question: Who did the 49ers, of the city where Chen lived in 2005, lose to in Super Bowl XLVII?

full_context: Document 1: Super Bowl XXXV: Super Bowl XXXV was an American football game between the American Football Conference (AFC) champion Baltimore Ravens and the National Football Conference (NFC) champion New York Giants to decide the National Football League (NFL) champion for the 2000 season. The Ravens defeated the Giants by the score of 34 -- 7, tied for the seventh largest Super Bowl margin of victory with Super Bowl XXXVII. The game was played on January 28, 2001 at Raymond James Stadium in Tampa, Florida.
Document 2: Steve Chen: Chen was an employee at PayPal, where he first met Chad Hurley and Jawed Karim. Chen was also an early employee at Facebook, although he left after several months to start YouTube.In 2005, Chad Hurley, Jawed Karim and Chen founded YouTube, with Chen having the position of chief technology officer. In June 2006, Chen was named by Business 2.0 as one of "The 50 people who matter now" in business.On October 16, 2006, Chen and Hurley sold YouTube to Google, Inc. for $1.65 billion. Chen received 625,366 shares of Google and an additional 68,721 in a trust as part of the sale. As of 2018, the Google shares are valued at $729 million.He and Hurley started AVOS Systems which acquired Delicious from Yahoo! Inc.
Document 3: YouTube: YouTube is a global video-sharing website headquartered in San Bruno, California, United States. The service was created by three former PayPal employees in February 2005. In November 2006, it was bought by Google for US$1.65 billion. YouTube now operates as one of Google's subsidiaries. The site allows users to upload, view, rate, share, and comment on videos, and it makes use of WebM, H.264/MPEG-4 AVC, and Adobe Flash Video technology to display a wide variety of user-generated and corporate media video. Available content includes video clips, TV clips, music videos, movie trailers, and other content such as video blogging, short original videos, and educational videos.
Document 4: YouTube: According to a story that has often been repeated in the media, Hurley and Chen developed the idea for YouTube during the early months of 2005, after they had experienced difficulty sharing videos that had been shot at a dinner party at Chen's apartment in San Francisco. Karim did not attend the party and denied that it had occurred, but Chen commented that the idea that YouTube was founded after a dinner party "was probably very strengthened by marketing ideas around creating a story that was very digestible".
Document 5: Super Bowl XLIX: Super Bowl XLIX was an American football game played to determine the champion of the National Football League (NFL) for the 2014 season. The American Football Conference (AFC) champion New England Patriots defeated the National Football Conference (NFC) champion Seattle Seahawks, 28 -- 24, to earn their fourth Super Bowl title. The game was played on February 1, 2015, at University of Phoenix Stadium in Glendale, Arizona. It was the second time the stadium has hosted a Super Bowl, and the third one held in the Phoenix metropolitan area.
Document 6: YouTube: Much of YouTube's revenue goes to the copyright holders of the videos. In 2010 it was reported that nearly a third of the videos with advertisements were uploaded without permission of the copyright holders. YouTube gives an option for copyright holders to locate and remove their videos or to have them continue running for revenue. In May 2013, Nintendo began enforcing its copyright ownership and claiming the advertising revenue from video creators who posted screenshots of its games. In February 2015, Nintendo agreed to share the revenue with the video creators.
Document 7: YouTube: On November 6, 2013, Google implemented a new comment system that requires all YouTube users to use a Google+ account in order to comment on videos and making the comment system Google+ oriented. The changes are in large part an attempt to address the frequent criticisms of the quality and tone of YouTube comments. They give creators more power to moderate and block comments, and add new sorting mechanisms to ensure that better, more relevant discussions appear at the top. The new system restored the ability to include URLs in comments, which had previously been removed due to problems with abuse. In response, YouTube co-founder Jawed Karim posted the question "why the fuck do I need a google+ account to comment on a video?" on his YouTube channel to express his negative opinion of the change. The official YouTube announcement received 20,097 "thumbs down" votes and generated more than 32,000 comments in two days. Writing in the Newsday blog Silicon Island, Chase Melvin noted that "Google+ is nowhere near as popular a social media network as Facebook, but it's essentially being forced upon millions of YouTube users who don't want to lose their ability to comment on videos" and "Discussion forums across the Internet are already bursting with outcry against the new comment system". In the same article Melvin goes on to say:
Document 8: YouTube: YouTube offered the public a beta test of the site in May 2005. The first video to reach one million views was a Nike advertisement featuring Ronaldinho in September 2005. Following a $3.5 million investment from Sequoia Capital in November, the site launched officially on December 15, 2005, by which time the site was receiving 8 million views a day. The site grew rapidly, and in July 2006 the company announced that more than 65,000 new videos were being uploaded every day, and that the site was receiving 100 million video views per day. According to data published by market research company comScore, YouTube is the dominant provider of online video in the United States, with a market share of around 43% and more than 14 billion views of videos in May 2010.
Document 9: Super Bowl XLIV: Super Bowl XLIV was an American football game between the National Football Conference (NFC) champion New Orleans Saints and the American Football Conference (AFC) champion Indianapolis Colts to decide the National Football League (NFL) champion for the 2009 season. The Saints defeated the Colts by a score of 31 -- 17, earning their first Super Bowl win. The game was played at Hard Rock Stadium (the formerly - named - Joe Robbie Stadium) in Miami Gardens, Florida for the fifth time (and in South Florida for the tenth time), on February 7, 2010, the latest calendar date for a Super Bowl yet.
Document 10: YouTube: Conversely, YouTube has also allowed government to more easily engage with citizens, the White House's official YouTube channel being the seventh top news organization producer on YouTube in 2012 and in 2013 a healthcare exchange commissioned Obama impersonator Iman Crosson's YouTube music video spoof to encourage young Americans to enroll in the Affordable Care Act (Obamacare)-compliant health insurance. In February 2014, U.S. President Obama held a meeting at the White House with leading YouTube content creators to not only promote awareness of Obamacare but more generally to develop ways for government to better connect with the "YouTube Generation". Whereas YouTube's inherent ability to allow presidents to directly connect with average citizens was noted, the YouTube content creators' new media savvy was perceived necessary to better cope with the website's distracting content and fickle audience.
Document 11: Super Bowl XLIV: Super Bowl XLIV was an American football game between the National Football Conference (NFC) champions New Orleans Saints and the American Football Conference (AFC) champions Indianapolis Colts to decide the National Football League (NFL) champion for the 2009 season. The Saints defeated the Colts by a score of 31 -- 17, earning their first Super Bowl win. The game was played at Hard Rock Stadium (formerly Joe Robbie Stadium) in Miami Gardens, Florida, for the fifth time (and in South Florida for the tenth time), on February 7, 2010, the latest calendar date for a Super Bowl yet.
Document 12: Super Bowl XLVII: Super Bowl XLVII was an American football game between the American Football Conference (AFC) champion Baltimore Ravens and the National Football Conference (NFC) champion San Francisco 49ers to decide the National Football League (NFL) champion for the 2012 season. The Ravens defeated the 49ers by the score of 34 -- 31, handing the 49ers their first Super Bowl loss in franchise history. The game was played on February 3, 2013, at Mercedes - Benz Superdome in New Orleans, Louisiana. This was the tenth Super Bowl to be played in New Orleans, equaling Miami's record of ten in an individual city.
Document 13: Super Bowl XLVII: Super Bowl XLVII was an American football game between the American Football Conference (AFC) champion Baltimore Ravens and the National Football Conference (NFC) champion San Francisco 49ers to decide the National Football League (NFL) champion for the 2012 season. The Ravens defeated the 49ers by the score of 34-31, handing the 49ers their first Super Bowl loss in franchise history. The game was played on Sunday, February 3, 2013 at Mercedes-Benz Superdome in New Orleans, Louisiana. This was the tenth Super Bowl to be played in New Orleans, equaling Miami's record of ten in an individual city. This was the first Super Bowl to be held in New Orleans since Super Bowl XXXVI and it was the first to be played in that city since Hurricane Katrina on August 29, 2005.
Document 14: Super Bowl XLIV: Super Bowl XLIV was an American football game between the National Football Conference (NFC) champions New Orleans Saints and the American Football Conference (AFC) champions Indianapolis Colts to decide the National Football League (NFL) champion for the 2009 season. The Saints defeated the Colts by a score of 31 -- 17, earning their first Super Bowl win. The game was played at Hard Rock Stadium (formerly Joe Robbie Stadium) in Miami Gardens, Florida, for the fifth time (and in South Florida for the tenth time), on Sunday, February 7, 2010, the latest calendar date for a Super Bowl yet.
Document 15: Super Bowl XLV: Super Bowl XLV was an American football game between the American Football Conference (AFC) champion Pittsburgh Steelers and the National Football Conference (NFC) champion Green Bay Packers to decide the National Football League (NFL) champion for the 2010 season. The Packers defeated the Steelers by the score of 31 -- 25. The game was played on February 6, 2011, at Cowboys Stadium in Arlington, Texas, the first time the Super Bowl was played in the Dallas -- Fort Worth area.
ground_truth: Baltimore Ravens
sub_queries: Where did Chen live in 2005? Answer: San Francisco
who did the San Francisco 49ers lose to in the super bowl Answer: Baltimore Ravens