Question: Which documentary was released first, The Life of Birds or Genghis Blues?

Context paragraphs:
Genghis Blues: Genghis Blues (1999) is a documentary film directed by Roko Belic.  It centers on the journey of blind American singer Paul Pena to the isolated Russian Republic of Tuva due to his interest in Tuvan throat singing.

Genghis Khan (2004 TV series): Genghis Khan is a Chinese television series based on the life of Genghis Khan, the founder of the Mongol Empire in the 13th century.  Ba Sen, who portrayed the eponymous character in the series, is a descendant of Genghis Khan's second son, Chagatai.  The series was first broadcast on CCTV in China in 2004, on KBS in South Korea in 2005, and the Turkish state channel TRT-1.

Roko Belic: Roko Belic is an American film producer and director.  His directorial debut, "Genghis Blues", was nominated for an Academy Award for best documentary feature.

Genghis Khan (ATV TV series): Genghis Khan is a 1987 Hong Kong television series based on the life of Genghis Khan, the founder of the Mongol Empire in the 13th century.  The series was produced by ATV and released three months later than a similarly titled television series produced by ATV's rival TVB.

The Life of Birds: The Life of Birds is a BBC nature documentary series written and presented by David Attenborough, first transmitted in the United Kingdom from 21 October 1998.

Genghis Khan (TVB TV series): Genghis Khan is a Hong Kong television series based on the life of Genghis Khan, the founder of the Mongol Empire in the 13th century.  The series was first broadcast on TVB Jade in Hong Kong in 1987.  An alternative Chinese title for the series is 大漠英雄傳 (lit.  "Legend of the Hero of the Desert").

Taking Over (EP): Taking Over was an EP released by The King Blues in 2007.  It was available initially on their December 2007 tour of the UK.  The title is taken from the track "Taking Over" from their first album Under The Fog, however the version that appears on the EP differs from the album version.  The other three tracks on the EP were previously unreleased, although a different recording of "If Genghis Khan..." was released as the B-side to the first "Mr. Music Man" single.

Angry Birds Rio: Angry Birds Rio is the third puzzle video game in the "Angry Birds" series, developed by Rovio Entertainment.  Based on "Angry Birds", "Angry Birds Rio" was released for devices using Apple's iOS, Google's Android and Mac OS X in March 2011.  The game was released as a marketing tie-in with the 20th Century Fox animated films "Rio" and "Rio 2", and was promoted with those movies.  While utilizing the same basic gameplay as the original game, "Angry Birds Rio" added a number of new elements, most notably the first use of boss levels.

Börte: Börte (simply Borte, also Börte Üjin; Cyrillic: Бөртэ үжин; c. 1161–1230) was the first wife of Temüjin, who became Genghis Khan, the founder of the Mongol Empire.  Börte became the head of the first Court of Genghis Khan, and Grand Empress of his Empire.  Little is known about the details of her early life, but she was betrothed to Genghis at a young age, married at 17, and then kidnapped by a rival tribe.  The decision by her husband to rescue her may have been one of the key decisions that started him on his path to conquer the world.  She gave birth to four sons and five daughters, who, along with their own descendants, were the key bloodline which further expanded the Mongol Empire.

Genghis Khan (1965 film): Genghis Khan is a 1965 Technicolor film depicting the life and conquests of the Mongol emperor Genghis Khan in Panavision.  It was released in the United Kingdom and the United States in 1965 by Columbia Pictures, it was directed by Henry Levin and featured Omar Sharif, who that same year starred in another epic, "Doctor Zhivago".  The film also included James Mason, Stephen Boyd, Eli Wallach, Françoise Dorléac and Telly Savalas.

Supporting paragraphs: The Life of Birds Genghis Blues
Answer: The Life of Birds