In this task, you're given a question, along with a context passage which has extra information available on certain terms mentioned in it, i.e., the proper nouns in the passage. Your job is to determine whether information from more than one term is needed to answer the question. Indicate your choice as 'a' for Yes or 'b' for No.

Example Input: Question: What is the current population of the city where Bricher began his career as a businessman? Passage:Bricher was born in Portsmouth, New Hampshire. He was educated in an academy at Newburyport, Massachusetts. He began his career as a businessman in Boston, Massachusetts. When not working, he studied at the Lowell Institute. He also studied with Albert Bierstadt, William Morris Hunt, and others. He attained noteworthy skill in making landscape studies from nature, and after 1858 devoted himself to the art as a profession. He opened a studio in Boston, and met with some success there. In 1868 he moved to New York City, and at the National Academy of Design that year he exhibited "Mill-Stream at Newburyport." Soon afterward he began to use watercolors in preference to oils, and in 1873 was chosen a member of the American Watercolor Society. In the 1870s, he primarily did maritime themed paintings, with attention to watercolor paintings of landscape, marine, and coastwise scenery. He often spent summers in Grand Manan, where he produced such notable works as Morning at Grand Manan (1878). In 1879, Bricher was elected into the National Academy of Design as an Associate member.

Example Output: b

Example Input: Question: Besides Umbriel, what are the names of the moons that orbit Uranus? Passage:Umbriel orbits Uranus at the distance of about , being the third farthest from the planet among its five major moons. Umbriel's orbit has a small eccentricity and is inclined very little relative to the equator of Uranus. Its orbital period is around 4.1Earth days, coincident with its rotational period. In other words, Umbriel is a synchronous or tidally locked satellite, with one face always pointing toward its parent planet. Umbriel's orbit lies completely inside the Uranian magnetosphere. This is important, because the trailing hemispheres of airless satellites orbiting inside a magnetosphere (like Umbriel) are struck by magnetospheric plasma, which co-rotates with the planet. This bombardment may lead to the darkening of the trailing hemispheres, which is actually observed for all Uranian moons except Oberon (see below). Umbriel also serves as a sink of the magnetospheric charged particles, which creates a pronounced dip in energetic particle count near the moon's orbit as observed by Voyager 2 in 1986.

Example Output: b

Example Input: Question: When was the building where the heads of the major railroads met in 1883 erected? Passage:In 1870, Charles F. Dowd proposed four time zones based on the meridian through Washington, DC for North American railroads. In 1872. he revised his proposal to base it on the Greenwich meridian. Sandford Fleming, a Scottish-born engineer operating in Canada, proposed worldwide Standard Time at a meeting of the Royal Canadian Institute on February 8, 1879. Cleveland Abbe advocated standard time to better coordinate international weather observations and resultant weather forecasts, which had been coordinated using local solar time. In 1879 he recommended four time zones across the contiguous United States, based upon Greenwich Mean Time. The General Time Convention (renamed the American Railway Association in 1891), an organization of US railroads charged with coordinating schedules and operating standards, became increasingly concerned that if the US government adopted a standard time scheme it would be disadvantageous to its member railroads. William F. Allen, the Convention secretary, argued that North American railroads should adopt a five-zone standard, similar to the one in use today, to avoid government action. On October 11, 1883, the heads of the major railroads met in Chicago at the Grand Pacific Hotel and agreed to adopt Allen's proposed system.

Example Output:
b