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: How old was Griff Rhys Jones when the BBC docudrama Charles Dickens & the Invention of Christmas was released? Passage:In December 2007 she appeared as herself in the BBC docudrama Charles Dickens & the Invention of Christmas, written and presented by Griff Rhys Jones. She also appeared in Channel 4's 2008 documentary Dickens's Secret Lover, which was concerned with Dickens's relationship with the actress Ellen Ternan. In December 2011 she appeared on BBC One's Songs of Praise and for BBC Two in Mrs Dickens' Family Christmas, during which she was interviewed by Sue Perkins. In January 2013 she appeared in all three episodes of BBC Two's Queen Victoria's Children and in an episode of Find My Past which was concerned with the affair between Charles Dickens and Ellen Ternan. She has appeared twice on BBC One's The One Show, interviewed about Lizzie Siddal and about Charles Dickens's will. She was the presenter for BBC One's Inside Out London: Dickens and Health Her radio appearances include The Today Programme (BBC Radio 4); Woman's Hour (BBC Radio 4); The Aled Jones Show (BBC Radio 2); The Robert Elms Show (BBC London); The Lynn Parsons Show (Smooth Radio and BBC Berkshire); Glad To Be Grey with Mary Beard (BBC Radio 4) and Behind the Looking Glass with Lauren Laverne (BBC Radio 4). In 2013, Hawksley unveiled a new blue plaque to her great great great grandfather, at 22 Cleveland Street, London.

Example Output: b

Example Input: Question: How many miles would the Empire Nightingale travel when crossing the Atlantic Ocean to Yorkshire? Passage:Empire Nightingale would appear to have crossed the Atlantic Ocean from the United States independently, as she does not appear as a member of a convoy until 27 June, when she departed Middlesbrough, Yorkshire as a member of Convoy EC 31. The convoy had departed from Southend, Essex the previous day and arrived at the Clyde on 1 July. She left the convoy at Oban, Argyllshire, departing on 3 July for Baltimore, Maryland, United States, which was reached on 22 July. Empire Nightingale departed Baltimore on 10 August for Halifax, Nova Scotia, Canada, arriving five days later. Carrying a cargo of steel, she departed on 21 August with Convoy HX 146, which arrived at Liverpool, Lancashire on 6 September. She left the convoy at Loch Ewe to join Convoy WN 177, which departed from Oban on 5 September and arrived at Methil, Fife on 8 September. Empire Nightingale then joined Convoy FS 589, which departed that day and arrived at Southend on 10 September. She left the convoy at Hull, Yorkshire on 10 September.

Example Output: b

Example Input: Question: How large is the lake that the trail passes south of? Passage:Reports from the fur trappers who first entered the mountains and those following mention the trail through the pass as being in long term us by the Shoshone, Bannack, Arapaho, Gros Ventre, Flat Head or Bitterroot Salish, Nez Perce, Crow and others. The pass provide access into three river sheds. An east-west route ran from the east up the Wind River valley and provided a western route by the Gros Ventre or Hoback Rivers to the Valley of the Snake River in Jackson's Hole. To go south, the traveler would follow the Green River. The Union Pass Route was an extension of a North South Route up the Valley of the Yellowstone. Coming up the Valley of the Thoroughfare, west of the Absaroka Mountains and south of Yellowstone Lake, the trail followed the North Fork of the Yellowstone. Crossing over Two Ocean Pass, the trail split east and west around Terrace Mountain into the Wind River Valley at DuNoir. From Union Pass south bound travelers could use the Green River Valley to connect east through South Pass or west toward the Snake River.

Example Output:
b