In this task, you're given a question, along with a context passage. The passage will not have a direct answer to the question, but can include some information and a clue for the answer. Assuming you can only obtain information about one entity in the passage, your job is to determine whether information from the passage can be used to answer the question. Indicate your choice as 'a' for Yes or 'b' for No.

Ex Input:
Question: Which team did Ferby lose to in the semi-finals of the 2001 Worlds? Passage:In 1999, Rycroft left the team to play with Ferbey's main rival, Kevin Martin. Rycroft was replaced by Marcel Rocque. The Ferbey Four that would dominate the Brier for the next few years was complete. Ferbey made his return to the Alberta provincials in 1999. While they didn't win, they did return in 2001 with a bang. They went on to winning not only the Alberta championship, but the 2001 Nokia Brier as well beating Kerry Burtnyk of Manitoba 84 in the final. This sent the team to the 2001 Worlds where they lost both their semi-final game and the bronze medal game, which they gave up to Pal Trulsen of Norway. In 2002, Ferbey won his fourth Brier, the 2002 Nokia Brier, which was his team's 2nd. They beat John Morris 94 in the final. This time, at the 2002 Worlds in Bismarck, North Dakota his team won the championship, beating the same Pal Trulsen, 105. Ferbey and his team would return to the Brier, at the 2003 Nokia Brier in Halifax, Nova Scotia. In the finals, they beat the home-town favourites Mark Dacey 84 in the finals. At the 2003 Ford World Curling Championship, his team won their 2nd world title, beating Ralph Stockli of Switzerland 106 in the finals. The 2004 Nokia Brier was a blip on his team's record. After returning to the Brier for the fourth straight year, an unprecedented feat especially considering the great number of good teams in Alberta, his team would bow out in the final. After a 101 round-robin record, Ferbey and his team lost out to the same team they beat the previous year, Mark Dacey of Nova Scotia, in a 109 game where Ferbey's team surrendered a lead. However, Team Ferbey did not give up, and their reign would not be over. In 2005, the once again won the Alberta championships, and once again won the 2005 Canadian championships. This set a record, as his team became the first to win 4 championships as a team. The final was against Nova Scotia again, albeit a different team, that of Shawn Adams. In another close game, team Ferbey pulled it out and won 54 in the final. His trip to the 2005 Men's Ford World Curling Championships were marked with struggles, as the team finished the round-robin with three losses tied for first with five other teams. After having a 43 record, Ferbey mounted eight straight wins to win the championship over David Murdoch of Scotland in a convincing 114 victory. Additionally, the Ferbey rink was the first team in history to score five on any single end in the world finals and they managed this feat twice at the 2005 Ford World Curling Championships.

Ex Output:
a

Ex Input:
Question: Which states aided the Latin Empire under the benner "Crusader States"? Passage:The NicaeanLatin wars were a series of wars between the Latin Empire and the Empire of Nicaea, starting with the dissolution of the Byzantine Empire by the Fourth Crusade in 1204. The Latin Empire was aided by other Crusader states established on Byzantine territory after the Fourth Crusade, as well as the Republic of Venice, while the Empire of Nicaea was assisted occasionally by the Second Bulgarian Empire, and sought the aid of Venice's rival, the Republic of Genoa. The conflict also involved the Greek state of Epirus, which also claimed the Byzantine inheritance and opposed Nicaean hegemony. The Nicaean reconquest of Constantinople in 1261 AD and the restoration of the Byzantine Empire under the Palaiologos dynasty did not end the conflict, as the Byzantines launched on and off efforts to reconquer southern Greece (the Principality of Achaea and the Duchy of Athens) and the Aegean islands until the 15th century, while the Latin powers, led by the Angevin Kingdom of Naples, tried to restore the Latin Empire and launched attacks on the Byzantine Empire.

Ex Output:
b

Ex Input:
Question: How big is the city that Cronkite lived in until he was 10? Passage:Cronkite lived in Kansas City, Missouri, until he was ten, when his family moved to Houston, Texas. He attended elementary school at Woodrow Wilson Elementary School, junior high school at Lanier Junior High School (now Lanier Middle School) and high school at San Jacinto High School, where he edited the high school newspaper. He was a member of the Boy Scouts. He attended college at the University of Texas at Austin (UT), entering in the Fall term of 1933, where he worked on the Daily Texan and became a member of the Nu chapter of the Chi Phi Fraternity. He also was a member of the Houston chapter of DeMolay, a Masonic fraternal organization for boys. While attending UT, Cronkite had his first taste of performance, appearing in a play with fellow student Eli Wallach. He dropped out in 1935, not returning for the Fall term, in order to concentrate on journalism.

Ex Output:
b