Problem: Extract the answer to the question from the following context. Question: What family had two members take the throne? Context: During the early High Middle Ages, Germany was ruled by the Ottonian dynasty, which struggled to control the powerful dukes ruling over territorial duchies tracing back to the Migration period. In 1024, they were replaced by the Salian dynasty, who famously clashed with the papacy under Emperor Henry IV (r. 1084–1105) over church appointments as part of the Investiture Controversy. His successors continued to struggle against the papacy as well as the German nobility. A period of instability followed the death of Emperor Henry V (r. 1111–25), who died without heirs, until Frederick I Barbarossa (r. 1155–90) took the imperial throne. Although he ruled effectively, the basic problems remained, and his successors continued to struggle into the 13th century. Barbarossa's grandson Frederick II (r. 1220–1250), who was also heir to the throne of Sicily through his mother, clashed repeatedly with the papacy. His court was famous for its scholars and he was often accused of heresy. He and his successors faced many difficulties, including the invasion of the Mongols into Europe in the mid-13th century. Mongols first shattered the Kievan Rus' principalities and then invaded Eastern Europe in 1241, 1259, and 1287.

A: Barbarossa


Problem: Extract the answer to the question from the following context. Question: What dropped significantly lower than expected? Context: The continuing decline influenced further changes for season 14, including the loss of Coca-Cola as the show's major sponsor, and a decision to only broadcast one, two-hour show per week during the top 12 rounds (with results from the previous week integrated into the performance show, rather than having a separate results show). On May 11, 2015, prior to the fourteenth season finale, Fox announced that the fifteenth season of American Idol would be its last. Despite these changes, the show's ratings would decline more sharply. The fourteenth season finale was the lowest-rated finale ever, with an average of only 8.03 million viewers watching the finale.

A: The fourteenth season finale


Problem: Extract the answer to the question from the following context. Question: What can be said of both James Zabiela and Craig David? Context: The city is home or birthplace to a number of contemporary musicians such as R'n'B singer Craig David, Coldplay drummer Will Champion, former Holloways singer Rob Skipper as well as 1980s popstar Howard Jones. Several rock bands were formed in Southampton, including Band of Skulls, The Delays, Bury Tomorrow, Heart in Hand, Thomas Tantrum (disbanded in 2011) and Kids Can't Fly (disbanded in 2014). James Zabiela, a highly regarded and recognised name in dance music, is also from Southampton.

A: from Southampton


Problem: Extract the answer to the question from the following context. Question: What happened before the civil war, the Battle of Ankara or Mehmed I emerging as the sultan? Context: With the extension of Turkish dominion into the Balkans, the strategic conquest of Constantinople became a crucial objective. The empire had managed to control nearly all former Byzantine lands surrounding the city, but in 1402 the Byzantines were temporarily relieved when the Turco-Mongol leader Timur, founder of the Timurid Empire, invaded Anatolia from the east. In the Battle of Ankara in 1402, Timur defeated the Ottoman forces and took Sultan Bayezid I as a prisoner, throwing the empire into disorder. The ensuing civil war lasted from 1402 to 1413 as Bayezid's sons fought over succession. It ended when Mehmed I emerged as the sultan and restored Ottoman power, bringing an end to the Interregnum, also known as the Fetret Devri.

A:
the Battle of Ankara