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: When was the Great Fire of London?
 Passage:Bermondsey was historically a rural parish on the outskirts of London until the 17th century when the area began to be developed as a wealthy suburb following the Great Fire of London. By the 19th century, the once affluent parts of Bermondsey had experienced a serious decline, and became the site of notorious slums with the arrival of industrialisation, docks and migrant housing, especially along the riverside. The most notorious of the slums was known as Jacob's Island, with the boundary approximately the confluence of the Thames and subterranean River Neckinger, at St Saviour's Dock across from Shad Thames, to the west, a tidal ditch just west of George Row to the east, and another tidal ditch just north of London Street (now Wolseley Street) to the south. It was a particularly squalid rookery, and described as "The very capital of cholera" and "The Venice of drains" by The Morning Chronicle in 1849.


Ex Output:
b


Ex Input:
Question: What year was the man who went around the world on the HMS Beagle born? Passage:Beagle is a crater lying within the Margaritifer Sinus quadrangle (MC-19) portion of the planet Mars, the crater is one of multiple topographical depressions within the Meridiani Planum extraterrestrial plain, which was explored by the Opportunity rover. It was located by the rover in images taken on sol 855 (June 20, 2006), 310 metres (1,107 ft) away. It is on the edge of the much larger ejecta blanket surrounding the crater Victoria, named the Victoria Annulus. This impact crater was named in honor of HMS Beagle of the Royal Navy, ordered in February 1817, which carried Charles Darwin on his voyage round the world.


Ex Output:
b


Ex Input:
Question: When did the person in charge of Arthur first achieve their rank? Passage:USS Sachem was originally commanded by Captain H. W. Morris, the former U.S. Navy commander of New Orleans, and was armed with one 20 lb (0.91 kg) parrott rifle and four 32 pounder (15 kg) cannons. The size of her crew was about fifty; she had also participated in several other historic naval engagements such as Hampton Roads and the Battle of Forts Jackson and St. Philip. Captain Morris is not believed to have fought in this battle. Lieutenant Amos Johnson commanded Sachem. Lieutenant John W. Kittredge was in charge of Arthur, which held over eighty men and was armed with six 32 pounder smooth-bore guns. Kittredge commanded the flotilla and Arthur was the flagship of the force. Corypheus mounted one 30 lb (14 kg) rifled gun and one 24 pounder (11 kg) howitzer. She had a crew of twenty-eight men and was commanded by Acting Master A. T. Spear. Bella Italias armament and crew are not known. Reindeer mustered six 24 pounder howitzers. Little is known of the Confederate ships.


Ex Output:

a