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 were the crew members on the flight to the moon in 1972? Passage: are three views of Mare Tranquillitatis on the Moon, taken by the mapping camera of the Apollo 17 mission in 1972, facing south-southwest from an average altitude of 111km on Revolution 36 of the mission. At the left is the east side of Mare Tranquillitatis, with the craters Franz (bottom right), Lyell (dark floor, right of center), and Taruntius (upper left). The "bay" of dark mare (basalt) at left is Sinus Concordiae, with "islands" of older, light highland material. At the right is the crater Cauchy, which lies between the Rupes Cauchy and Cauchy rille. The center photo shows the central mare with craters Vitruvius (lower right) and Gardner (bottom center). At the horizon are lighter highlands at the southern margin of the mare, near the Apollo 11 landing site. The crater Jansen is visible at the edges of both the center and right photos. The right photo shows the western mare, with the craters Dawes (lower left) and the large Plinius (43km diameter), with the Plinius Rilles in the foreground. These photos were taken within minutes of each other as the command module America orbited the Moon. The Sun elevation drops from 46 degrees at left to 30 degrees at right.

Example Output: b

Example Input: Question: When was the firm that designed the Oregon library established? Passage:The Oregon Library was designed by Chicago architects Pond and Pond. The Ponds were members of the Eagle's Nest Art Colony, founded by Lorado Taft, and their association with Taft and the colony led them to design the library. Their design was influenced by the colony, and a combination of two architectural styles, Classical Revival and the Arts and Crafts movement. The completed library included a second floor art gallery to which members of Eagle's Nest donated works for a permanent collection. The gallery's collection includes 64 paintings and sculptures as well as a Currier and Ives lithograph collection appraised at US$700,000. The Oregon Public Library was listed on the U.S. National Register of Historic Places in 2003, three years later it was included as a contributing property in a historic district that received the National Register designation.

Example Output: a

Example Input: Question: How old was Benjamin Disraeli when he convinced John Murray to start a new morning paper? Passage:In autumn 1825 the young Benjamin Disraeli convinced his father's friend, the publisher John Murray, that the time was ripe for a Canningite morning paper that would challenge The Times. Murray agreed to supply half of the capital, with Disraeli and John Diston Powles, a City speculator, each contributing one-quarter. Disraeli travelled to Chiefswood (near Melrose) to persuade John Gibson Lockhart (Sir Walter Scott's son-in-law) to edit the paper; Lockhart declined, but agreed to serve as editor of Murray's Quarterly Review and consult on the management of the paper. Disraeli returned to London and began preparations. Lockhart's suggestion that William Maginn be employed was accepted, and he was sent to Paris as foreign correspondent, where he "drank much and wrote little." Offices were leased in the fashionable West End on Great George Street, distant from both Fleet Street and Grub Street.

Example Output:
a