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: How many years did the Great Depression last? Passage:Originally from New Brunswick, Harrison graduated from Nova Scotia Agricultural College in 1922, and, in 1924, from the Ontario Agricultural College with a B.Sc. in agriculture. He earned an MSc in plant pathology from Macdonald Campus of McGill University a year later. A doctoral degree he started at the University of Toronto in 1929 was abandoned due to the Great Depression. He established a herbarium of mycological specimens where he was employed for many years at the Kentville Research Station (now the Atlantic Food and Horticulture Research Centre); most of his collections are now housed at the Canadian National Mycological Herbarium. His early research concerned the fungal infestation of plants, such as that of Colletotrichum lindemuthianum on beans (Phaseolus). Working with John Frederick DeWitt Hockey, they made many contributions to the control and prevention of diseases of horticultural crops. They were among the first to use the sticky slide spore trap to estimate the densities of fungal spores.


Ex Output:
b


Ex 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 111 km 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 (43 km 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.


Ex Output:
b


Ex Input:
Question: Which person that they coached to an award in 2003 was younger at the time? Passage:Mitchell currently works as a coach with former Swedish national champion Peter Johansson at the Skating Club of Boston. Their students include 2012 Skate America Silver Medalist Christina Gao, 2007 World Junior champion Stephen Carriere, 2008 Eastern Sectional champion Katrina Hacker, 2007 US National junior pewter medalist Curran Oi, 2007 Eastern Sectional champion Kylie Gleason, two time Junior Grand Prix gold medalist Juliana Cannarozzo, 2008 US National junior bronze medalist Brittney Rizo, 2007 Canadian Junior Champion Dana Zhalko-Tytarenko, and 2009 US National Junior Champion Ross Miner. They formerly coached 2003 U.S. pewter medalist Scott Smith, 2007 US National silver medalist Emily Hughes, 2004 US National Junior silver medalist Jason Wong, 2003 US National Novice bronze medalist Jessica Houston, and 2003 US National Junior Champion Erica Archambault.


Ex Output:

b