Question: I know that the answer to the question "Which of the following is not the name of a group of people: Rus, Oleg, or Byzantines?" is in "Relations between the Rus' and Byzantines became more complex after Oleg took control over Kiev, reflecting commercial, cultural, and military concerns. The wealth and income of the Rus' depended heavily upon trade with Byzantium. Constantine Porphyrogenitus described the annual course of the princes of Kiev, collecting tribute from client tribes, assembling the product into a flotilla of hundreds of boats, conducting them down the Dnieper to the Black Sea, and sailing to the estuary of the Dniester, the Danube delta, and on to Constantinople. On their return trip they would carry silk fabrics, spices, wine, and fruit. The importance of this trade relationship led to military action when disputes arose. The Primary Chronicle reports that the Rus' attacked Constantinople again in 907, probably to secure trade access. The Chronicle glorifies the military prowess and shrewdness of Oleg, an account imbued with legendary detail. Byzantine sources do not mention the attack, but a pair of treaties in 907 and 911 set forth a trade agreement with the Rus', the terms suggesting pressure on the Byzantines, who granted the Rus' quarters and supplies for their merchants and tax-free trading privileges in Constantinople.". Can you tell me what it is?
Answer: Oleg

[Q]: I know that the answer to the question "Which happened later: Seibu reopened or Galeries Lafayette joined the Indonesian market?" is in "The middle up segment is mainly occupied by Metro Department Store originated from Singapore and Sogo from Japan. 2007 saw the re-opening of Jakarta's Seibu, poised to be the largest and second most upscale department store in Indonesia after Harvey Nichols, which the latter closed in 2010 and yet plans to return. Other international department stores include Debenhams and Marks & Spencer. Galeries Lafayette also joins the Indonesian market in 2013 inside Pacific Place Mall. This department store is targeting middle up market with price range from affordable to luxury, poised to be the largest upscale department store. Galeries Lafayette, Debenhams, Harvey Nichols, Marks & Spencer, Seibu and Sogo are all operated by PT. Mitra Adiperkasa.". Can you tell me what it is?
****
[A]: Galeries Lafayette also joins the Indonesian market

input: Please answer the following: I know that the answer to the question "What went from one place to another?" is in "Aristotle noted that cranes traveled from the steppes of Scythia to marshes at the headwaters of the Nile. Pliny the Elder, in his Historia Naturalis, repeats Aristotle's observations.". Can you tell me what it is?
++++++++++
output: cranes

Please answer this: I know that the answer to the question "What did defeating Real Madrid do for Barca in 2009?" is in "Barca beat Athletic Bilbao 41 in the 2009 Copa del Rey Final, winning the competition for a record-breaking 25th time. A historic 26 victory against Real Madrid followed three days later and ensured that Barcelona became La Liga champions for the 200809 season. Barca finished the season by beating the previous year's Champions League winners Manchester United 20 at the Stadio Olimpico in Rome to win their third Champions League title and completed the first ever treble won by a Spanish team. The team went on to win the 2009 Supercopa de Espana against Athletic Bilbao and the 2009 UEFA Super Cup against Shakhtar Donetsk, becoming the first European club to win both domestic and European Super Cups following a treble. In December 2009, Barcelona won the 2009 FIFA Club World Cup, and became the first football club ever to accomplish the sextuple. Barcelona accomplished two new records in Spanish football in 2010 as they retained the La Liga trophy with 99 points and won the Spanish Super Cup trophy for a ninth time.". Can you tell me what it is?
++++++++
Answer: ensured that Barcelona became La Liga champions for the 200809 season

Problem: I know that the answer to the question "What happens beyond 572 degrees?" is in "Uranium metal heated to 250 to 300 C (482 to 572 F) reacts with hydrogen to form uranium hydride. Even higher temperatures will reversibly remove the hydrogen. This property makes uranium hydrides convenient starting materials to create reactive uranium powder along with various uranium carbide, nitride, and halide compounds. Two crystal modifications of uranium hydride exist: an form that is obtained at low temperatures and a form that is created when the formation temperature is above 250 C.". Can you tell me what it is?

A: reversibly remove the hydrogen

input: Please answer the following: I know that the answer to the question "In what country was the use of rib vaults, pointed arches, flying buttresses and large stained glass windows first developed?" is in "From the early 12th century, French builders developed the Gothic style, marked by the use of rib vaults, pointed arches, flying buttresses, and large stained glass windows. It was used mainly in churches and cathedrals, and continued in use until the 16th century in much of Europe. Classic examples of Gothic architecture include Chartres Cathedral and Reims Cathedral in France as well as Salisbury Cathedral in England. Stained glass became a crucial element in the design of churches, which continued to use extensive wall-paintings, now almost all lost.". Can you tell me what it is?
++++++++++
output:
France