Question: In the CFL, if the game is tied at the end of regulation play, then each team is given an equal number of chances to break the tie. A coin toss is held to determine which team will take possession first; the first team scrimmages the ball at the opponent's 35-yard line and advances through a series of downs until it scores or loses possession. If the team scores a touchdown, starting with the 2010 season, it is required to attempt a 2-point conversion. The other team then scrimmages the ball at the same 35-yard line and has the same opportunity to score. After the teams have completed their possessions, if one team is ahead, then it is declared the winner; otherwise, the two teams each get another chance to score, scrimmaging from the other 35-yard line. After this second round, if there is still no winner, during the regular season the game ends as a tie. In a playoff or championship game, the teams continue to attempt to score from alternating 35-yard lines, until one team is leading after both have had an equal number of possessions.
Is there an answer to this question: In which year did the CFL begin requiring teams to attempt 2-point conversions after scoring in a tie-breaking situation?

Answer: 2010

Question: 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. 10841105) 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. 111125), who died without heirs, until Frederick I Barbarossa (r. 115590) 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. 12201250), 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.
Is there an answer to this question: The clash between Henry IV and the pope was part of what greater conflict?

Answer: Investiture Controversy

Question: In 1687, Isaac Newton published the Principia Mathematica, detailing two comprehensive and successful physical theories: Newton's laws of motion, which led to classical mechanics; and Newton's Law of Gravitation, which describes the fundamental force of gravity. The behavior of electricity and magnetism was studied by Faraday, Ohm, and others during the early 19th century. These studies led to the unification of the two phenomena into a single theory of electromagnetism, by James Clerk Maxwell (known as Maxwell's equations).
Is there an answer to this question: What concept did the Law of Gravitation deal with?

Answer: the fundamental force of gravity

Question: The firm of John Russell Pope designed Broad Street Station as well as Branch House on Monument Avenue, designed as a private residence in the Tudor style, now serving as the Branch Museum of Architecture and Design. Broad Street Station (or Union Station), designed in the Beaux-Arts style, is no longer a functioning station but is now home to the Science Museum of Virginia. Main Street Station, designed by Wilson, Harris, and Richards, has been returned to use in its original purpose. The Jefferson Hotel and the Commonwealth Club were both designed by the classically trained Beaux-Arts architects Carrere and Hastings. Many buildings on the University of Richmond campus, including Jeter Hall and Ryland Hall, were designed by Ralph Adams Cram, most famous for his Princeton University Chapel and the Cathedral of Saint John the Divine.
Is there an answer to this question: What is another name for Broad Street Station?

Answer:
Union Station