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.

Ex Input:
Question: What man was the lead guitarist for the shortest amount of times? Passage:The Yardbirds are an English blues rock band from London. Formed in May 1963, the group originally included lead vocalist Keith Relf, lead guitarist Anthony "Top" Topham, rhythm guitarist Chris Dreja, bassist Paul Samwell-Smith and drummer Jim McCarty. In October, Topham was replaced by Eric Clapton. He remained until 13 March 1965, when he left due to creative disagreements. Clapton recommended Jimmy Page to replace him, but he declined and Jeff Beck took over. Page later joined on bass the following June, after Samwell-Smith abruptly quit; Dreja later took over the role, allowing Page to join Beck on guitar. This lineup was short-lived, however, as Beck left in November 1966. The group continued as a four-piece until July 1968, when Relf and McCarty left due to creative differences, primarily with Page. Dreja initially remained, but by August Page formed a new group with vocalist Robert Plant, bassist John Paul Jones and drummer John Bonham, who later renamed themselves Led Zeppelin.


Ex Output:
a


Ex Input:
Question: Who are some authors most associated with the type of books Lange enjoyed? Passage:Lange was born in Warsaw into the patriotic Jewish family of Henryk Lange (1815–1884) and Zofia née Eisenbaum (1832–1897). His father took part in the November Uprising against the Russian Partition of Poland. He was an admirerer of Romantic literature and its ideals. Antoni Lange enrolled at Warsaw University but around 1880 he was expelled for his patriotic activity by the Tsarist namiestnik Apuchtin who ruled the university at that time. He supported himself financially as a tutor but also published poetry under the pen-names Napierski and Antoni Wrzesień. He decided to study in Paris where he encountered new trends in literature, philosophy and art. In France he became familiar with the theories of Jean Martin Charcot, as well as Spiritualism, parapsychology, the philosophy of Arthur Schopenhauer and Friedrich Nietzsche, oriental religions, European and Eastern literature and modern literary criticism. He took part in the literary meetings of Stéphane Mallarmé.


Ex Output:
b


Ex Input:
Question: How big is Anthony Owen's current employer? Passage:Anthony 'Tony' David Owen is an economist and academic, currently employed as Emeritus Professor in Energy Economics at University College London Australia. He was appointed to the position in July 2013, and was previously Academic Director of the School of Energy and Resources at its campus in Adelaide, Australia. He also held the Santos Chair in Energy Resources at the time. He previously held positions at Curtin University of Technology and the University of New South Wales, and worked as a consultant and visiting appointee in North America, Europe and Asia. In 2007 he chaired the Inquiry into Electricity Supply in New South Wales. Owen wrote a book entitled The economics of uranium, which was published by Praeger in 1985. Since then, Owen has written periodically on the possibility of nuclear power in Australia, including for the Committee for Economic Development of Australia in 2011. His academic papers have featured in peer-reviewed journals such as Energy Policy, Economic Record, Agenda and the Journal of Nuclear Research and Development. He also edited the book The Economics of Climate Change with Nick Hanley which was published by Routledge, London in 2004.


Ex Output:

b