Question: Write an article that answers the following question: Which brother raided Ladoga first, Sveinn Hakonarson or Eirikr Hakonarson?
Article: Scandinavians maintained trade relations and other links with Novgorod from the Viking Age onwards. Merchants from Gotland operated both their own trading house and the St. Olof church in Novgorod. Scandinavians also carried out isolated raids on Novgorod. Eirikr Hakonarson raided Ladoga in 997, and his brother Sveinn Hakonarson followed suit in 1015. After the marriage of Yaroslav I to Ingegerd of Sweden in 1019, Ladoga became a jarldom in the orbit of Kievan Rus. It was ruled by Ragnvald Ulfsson, the alleged father of King Stenkil of Sweden . Dynastic marriages took place between Russian and Scandinavian royal families - for example, in the 1090s Stenkil's granddaughter Christina married Mstislav of Novgorod, upon whose death in 1132 Novgorod seceded from Kievan Rus. The major turning point into more permanent conflict between Sweden and Novgorod arrived with Sweden's firmer organization into the Catholic Church in the 12th century and papal involvement in crusades against lands controlled by the Orthodox Church.

Question: Write an article that answers the following question: Which team was playing at home?
Article: Hoping to rebound from their loss to the Saints the Rams played inside their dome for an interconference duel with the Chiefs.In the first quarter the Rams took the early lead as kicker Josh Brown nailed a 37 and a 52-yard field goal. They trailed with QB Matt Cassel throwing a 2-yard TD pass to TE Leonard Pope, which got worse as RB Jamaal Charles got a 2-yard TD run, followed by kicker Ryan Succop making a 53 and a 38-yard field goal. The Rams tried to break down the lead with RB Steven Jackson making a 5-yard TD run, but continued to struggle as RB Thomas Jones got a 2-yard TD run.

Question: Write an article that answers the following question: What were the distances of the field goals made by Nick Novak?
Article: Hoping to rebound from their blowout loss at Green Bay, the Broncos returned home for an AFC West duel with the San Diego Chargers. The Chargers took the early lead in the first quarter, with a 24-yard field goal by placekicker Nick Novak. The Broncos grabbed the lead, when cornerback Cassius Vaughn returned an interception off Chargers' quarterback Philip Rivers 55 yards for a touchdown. The Chargers responded, with a 32-yard field goal by Novak. The Broncos extended their lead in the second quarter, with a 32-yard field goal by placekicker Matt Prater. However, the Chargers would re-claim the lead, with a 2-yard touchdown run by Rivers, a 28-yard field goal by Novak, followed by a 42-yard touchdown pass from Rivers to wide receiver Malcom Floyd, giving San Diego a 23-10 halftime lead. The Broncos benched quarterback Kyle Orton in favor of Tim Tebow. After a scoreless third quarter, the Chargers added to their lead, with a 51-yard field goal by Novak. The Broncos responded, when Tebow scrambled for a 12-yard touchdown (with a two-point conversion run by running back Willis McGahee), then threw a 28-yard touchdown pass to running back Knowshon Moreno (with a failed two-point conversion attempt), to pull the Broncos to within 26-24 with just over three minutes left in the game. The Chargers responded, with a 35-yard field goal by Novak. The Broncos tried to rally with 24 seconds remaining in regulation, but Tebow's last-second desperation pass into the end zone was unsuccessful, sealing the win for San Diego. Defensive tackle Kevin Vickerson suffering an ankle injury early in the game. Though he later returned, he was placed on injured reserve one day later (October 10).

Question: Write an article that answers the following question: Which Chinese scholars estimated the value of pi?
Article: In 212 BC, the Emperor Qin Shi Huang commanded all books in the Qin Empire other than officially sanctioned ones be burned. This decree was not universally obeyed, but as a consequence of this order little is known about ancient Chinese mathematics before this date. After the Burning of books and burying of scholars of 212 BC, the Han dynasty (202 BC220 AD) produced works of mathematics which presumably expanded on works that are now lost. The most important of these is The Nine Chapters on the Mathematical Art, the full title of which appeared by AD 179, but existed in part under other titles beforehand. It consists of 246 word problems involving agriculture, business, employment of geometry to figure height spans and dimension ratios for Chinese pagoda towers, engineering, surveying, and includes material on right triangles. It created mathematical proof for the Pythagorean theorem, and a mathematical formula for Gaussian elimination. The treatise also provides values of , which Chinese mathematicians originally approximated as 3 until Liu Xin (scholar) (d. 23 AD) provided a figure of 3.1457 and subsequently Zhang Heng (78-139) approximated pi as 3.1724, as well as 3.162 by taking the square root of 10. Liu Hui commented on the Nine Chapters in the 3rd century AD and Liu Huis algorithm accurate to 5 decimal places (i.e. 3.14159). Though more of a matter of computational stamina than theoretical insight, in the 5th century AD Zu Chongzhi computed Milu to seven decimal places (i.e. 3.141592), which remained the most accurate value of for almost the next 1000 years. He also established a method which would later be called Cavalieris principle to find the volume of a sphere.