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.

Input: Consider Input: Question: When was the building where the heads of the major railroads met in 1883 erected? Passage:In 1870, Charles F. Dowd proposed four time zones based on the meridian through Washington, DC for North American railroads. In 1872. he revised his proposal to base it on the Greenwich meridian. Sandford Fleming, a Scottish-born engineer operating in Canada, proposed worldwide Standard Time at a meeting of the Royal Canadian Institute on February 8, 1879. Cleveland Abbe advocated standard time to better coordinate international weather observations and resultant weather forecasts, which had been coordinated using local solar time. In 1879 he recommended four time zones across the contiguous United States, based upon Greenwich Mean Time. The General Time Convention (renamed the American Railway Association in 1891), an organization of US railroads charged with coordinating schedules and operating standards, became increasingly concerned that if the US government adopted a standard time scheme it would be disadvantageous to its member railroads. William F. Allen, the Convention secretary, argued that North American railroads should adopt a five-zone standard, similar to the one in use today, to avoid government action. On October 11, 1883, the heads of the major railroads met in Chicago at the Grand Pacific Hotel and agreed to adopt Allen's proposed system.


Output: b


Input: Consider Input: Question: Which team did the New Orleans Saints beat in the 2006 NFC playoffs? Passage:The Buccaneers played their home opener against the 2006 NFC South champion New Orleans Saints. After scoring only 6 points the week before, the Buccaneers dominated the Saints, on offense and defense, at one point taking a 28–0 lead. Early in the first quarter, Barrett Ruud recovered a Deuce McAllister fumble, which set up a Tampa Bay scoring drive. Carnell Williams, who was back in the lineup after injuring his ribs the week before, capped off the drive with a one-yard touchdown run. Early in the second quarter, Joey Galloway scored on a 69-yard catch and run from quarterback Jeff Garcia. Inside the two-minute warning, Garcia and Galloway scored again, this time with a 24-yard touchdown, to take a 21–0 halftime lead. Halfway through the third quarter, Cato June intercepted a pass from Drew Brees. Two plays later, Garcia and Galloway connected for yet another big play, a 41-yard completion to the New Orleans 9-yard line. Williams capped off the drive with his second 1-yard touchdown. New Orleans' first score came with a 1-yard touchdown run by Mike Karney, aided by a 58-yard catch by Phillip Buchanon moments earlier. The Buccaneers improved to 1–1, into a tie for the NFC South lead. New Orleans fell to 0–2.


Output: b


Input: Consider Input: Question: Which southwest location of the river has fewer people living there? Passage:Poxte is a river and valley of the Maya Mountains in Guatemala. The valley is noted for numerous Maya sites such as Ixtutz and the Petén Caves. The river is located on the southwest of the Dolores plateau and northwest of Poptún, in the Guatemalan department of Petén. The source of the river is on the same plateau, near the villages of Boca del Monte and Santo Domingo. The river flows westwards through the hamlet of Poxte, it then disappears amongst the karst topography and resumes its course to the west. It continues westwards into the San Juan River, which is a tributary of the Machaquila River. The Machaquila River feeds into the Pasión River, which flows into the Usumacinta River and into the Gulf of Mexico. The upper reaches of the Poxte River shares its drainage with the Mopan River, which flows eastwards into the Caribbean Sea.



Output: b