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: Who was the founder of the railroad? Passage:The original train track through Irwindale were built by the Los Angeles and San Gabriel Valley Railroad. The Gold line uses the old right of way of the Los Angeles and San Gabriel Valley Railroad who built the first train tracks through Irwindale in 1887. The Los Angeles and San Gabriel Valley Railroad was founded in 1883, by James F. Crank with the goal of bringing a rail line to San Gabriel Valley from downtown Los Angeles. Los Angeles and San Gabriel Valley Railroad was sold on May 20, 1887 into the California Central Railway. In 1889 the rail line was consolidated into Southern California Railway Company. On Jan. 17, 1906 Southern California Railway was sold to the Atchison, Topeka and Santa Fe Railway and called the Pasadena Subdivision. Amtrak-Santa Fe ran the Southwest Chief and Desert Wind over this line through Irwindale, but relocated the Desert Wind to the Fullerton Line in 1986. The Santa Fe line served the San Gabriel Valley until 1994, when the 1994 Northridge earthquake weakened the bridge in Arcadia and the track was closed till the Gold line was built. The rail line crosses the San Gabriel River on a long girder bridge, then passes through the Santa Fe Dam Recreation Area (how it received its name). The rail line intersected the north end of the former SP Azusa Industrial Track at Irwindale (MP 118.2). Irwindale had a 6,165 foot rail siding that passed the Miller Brewing Company's Irwindale brewery. From there the tracks continued and crossed beneath Irwindale Avenue.

Ex Output:
b

Ex Input:
Question: What profession did Fritz Haber work in the year Barschall received his Ph.D? Passage:Barschall was born as Heinrich Hermann Barschall in Berlin, Germany; his father was a patent attorney who had received a Ph.D. in chemistry after studying with Nobel Laureates Emil Fischer and Fritz Haber. After beginning study in several universities in Germany, he emigrated to the United States in 1937 during the early Holocaust period; though raised as a Lutheran, he had some Jewish ancestry. He received his Ph.D. from Princeton University in 1940 under the direction of Rudolf Ladenburg; he also worked closely with John A. Wheeler. After a suggestion by Niels Bohr, he carried out in only a few days with fellow graduate student Morton H. Kanner the first demonstration of fission by fast neutrons and thorium and uranium. His thesis was on the interaction of fast neutrons with helium. In a paper with John A. Wheeler he reported the discovery of spin-orbit coupling in neutron scattering.

Ex Output:
b

Ex Input:
Question: Does the scene on the west side of the piazza take place in Italy? Passage:In Morning, a lady makes her way to church, shielding herself with her fan from the shocking view of two men pawing at the market girls. The scene is the west side of the piazza at Covent Garden, indicated by a part of the Palladian portico of Inigo Jones's Church of St Paul visible behind Tom King's Coffee House, a notorious venue celebrated in pamphlets of the time. Henry Fielding mentions the coffee house in both The Covent Garden Tragedy and Pasquin. At the time Hogarth produced this picture, the coffee house was being run by Tom's widow, Moll King, but its reputation had not diminished. Moll opened the doors once those of the taverns had shut, allowing the revellers to continue enjoying themselves from midnight until dawn. The mansion with columned portico visible in the centre of the picture, No. 43 King Street, is attributed to architect Thomas Archer (later 1st Baron Archer) and occupied by him at the date of Hogarth's works. It was situated on the north side of the piazza, while the coffee house was on the south side, as depicted in Hogarth's original painting. In the picture, it is early morning and some revellers are ending their evening: a fight has broken out in the coffee house and, in the melee, a wig flies out of the door. Meanwhile, stallholders set out their fruit and vegetables for the day's market. Two children who should be making their way to school have stopped, entranced by the activity of the market, in a direct reference to Swift's A Description of the Morning in which children "lag with satchels in their hands". Above the clock is Father Time and below it the inscription Sic transit gloria mundi. The smoke rising from the chimney of the coffee house connects these portents to the scene below.

Ex Output:
b