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.

Example Input: Question: Who was Akbar's predecessor to the Mughal throne? Passage:Gauda was once the "capital of the ancient bhukti or political division of Bengal known as Pundravardhana which lay on the eastern extremity of the Gupta Empire." During the rule of the Sena Dynasty, in the 11th-12th century, Gauda was rebuilt and extended as Lakshmanawati (later Lakhnauti), and it became the hub of the Sena empire. Gauda was conquered by Muhammad bin Bakhtiyar Khalji in 1205. During the Turko-Afghan period, "the city of Lakhnauti or Gauda continued to function initially as their capital but was abandoned in 1342 by the Ilyas Shahi sultans in favour of Pandua because of major disturbances along the river course of the Ganga." "Pandua then lay on the banks of the Mahananda, which was the major waterway of the sultanate at the time. However, when the Mahananda too began to veer away from the site of Pandua in the mid-15th century, Gauda was rebuilt and restored to the status of capital city by the Hussain Shahi sultans"... With the ascent of Akbar to the Mughal throne at Delhi... the Mughals annexed the ancient region of Gauda in 1576 and created the Diwani of Bengal. The centre of regional power shifted across the Ganga to Rajmahal. Following the demise of the independent sultanate, the regional importance of the Gauda or Malda region declined irreversibly and the city of Gauda was eventually abandoned.

Example Output: b

Example Input: Question: What was the age difference between the 17th century Polish king and the person he helped regain Prussian in exchange for his support against Sweden? Passage:The Duchy of Prussia was a duchy in the eastern part of Prussia from 15251701. In 1525 during the Protestant Reformation, the Grand Master of the Teutonic Knights, Albert of Hohenzollern, secularized the Prussian State of the Teutonic Order, becoming Albert, Duke in Prussia. His duchy, which had its capital in Konigsberg (Kaliningrad), was established as a fief of the Crown of Poland, as had been Teutonic Prussia since the Second Peace of Thorn in October 1466. This treaty had ended the War of the Cities or Thirteen Years' War and provided for the Order's cession of its rights over the western half of its territories to the Polish crown, which became the province of Royal Prussia, while the remaining part of the Order's land became a fief of the Kingdom of Poland (13851569). In the 17th century King John II Casimir of Poland submitted Frederick William to regain Prussian suzerainty in return for supporting Poland against Sweden. On July 29, 1657, they signed the Treaty of Wehlau in Wehlau (Polish: Welawa; now Znamensk), whereby Frederick William renounced a previous Swedish-Prussian alliance and John Casimir recognised Frederick William's full sovereignty over the Duchy of Prussia. Full sovereignty was a necessary prerequisite for upgrading the Duchy to Kingdom of Prussia in 1701.

Example Output: b

Example Input: Question: What country did the storm stall off the coast of around November 6th? Passage:On November 4, an extratropical disturbance was spawned just off the coast of western France, within a cold front, by another extratropical cyclone to the north, named "Quinn." This storm began causing heavy rainfall in northern Italy, leading to flooding in the region. On the next day, a low-pressure area formed over western France, and the system was named Rolf by the Free University of Berlin, which names all significant low pressure systems affecting Europe. As the storm slowly moved eastward, it caused flooding in the Balearic Islands. Rolf gradually organized, and convection began to increase in the storm. Over the next couple of days, the storm continued to organize as it moved eastward, approaching the northwestern coast of Italy. On November 5, Rolf's forward motion slowed while the storm was stationed above the Massif Central in southern France, maintaining a central pressure of . On November 6, the system moved into the western Mediterranean Sea and stalled off the coast of Liguria, while gradually strengthening, bringing additional flooding to the region. Around the same time, the storm's frontal structure shrunk to in length. During that evening, Rolf spawned a tornado over Alassio, in northern Italy, causing some structural damage. On November 7, 2011, Rolf turned westward and slowly transitioned from an extratropical system into a subtropical depression over the warm waters of the Mediterranean Sea, with the system acquiring a warm quasi-symmetric core, and with organized convective rainbands wrapping around the center of the storm. The storm was then given the designation Invest 99L, by the United States Naval Research Laboratory (the NRL). The NOAA also began watching the subtropical depression, which was now located in the Gulf of Lion. Later that day, Rolf transitioned from a subtropical depression into a tropical depression off the coast of France, and the NOAA gave Rolf the identifier 01M.

Example Output:
b