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: Were Caton and Beck both from Poland? Passage:From the bioelectricity of nerves, Marxow turned his attention, from 1876 on, to the global electrical activity of the cerebral hemispheres. Neuroanatomists had already determined at the time that its nervous tissue was also composed of cells (the neurons), with their bodies mainly located in the gray matter, and filamentary prolongations, the dendrites and the axons. Thus, it was only natural to assume that they would also display electrical activity. This important discovery, however, had not been made until that time, because many desynchronized electrical potentials with different polarities produce a cumulative global potential which is actually very small and difficult to detect with the sensitivity range of the measuring devices available at the time. Despite this, Marxow was able to prove for the first time that the peripheral stimulation of sensory organs, such as vision and hearing were able to provoke event-related small electrical potential swings on the surface of the cerebral cortex which was related to the projection of those senses. Strangely, however, Marxow did not publish his results, choosing instead to deposit them in a bank safe, with instructions to reveal them in 1883 only. Meanwhile, the first publications about what was later to be called the electroencephalogram came to light, independently demonstrated by Richard Caton (1842–1926), in Great Britain, and Adolf Beck (1863–1942) in Poland, both using laboratory animals.

Example Output: a

Example Input: Question: Who is the current leader of the party Hartley began leading in 1919? Passage:He was born in St. Johns, Canada East. The son of Edward Hartley Dewart, a Methodist minister who was a staunch advocate of prohibition, the younger Dewart inherited his Liberal politics but broke with his father on the temperance issue becoming a firm opponent of prohibition, a move that would cost him dearly later in life. He studied at the University of Toronto and Osgoode Hall and was called to the Ontario bar in 1887. Dewart set up practice in Toronto and served as crown attorney for York County from 1891 to 1904. He was first elected to the provincial legislature in a 1916 by-election after the death of James Joseph Foy in the Toronto Southwest electoral district, becoming the first Liberal to win a Toronto seat in a quarter century. In 1919, he became leader of the Ontario Liberal Party. He resigned as leader in 1921 due to opposition within his caucus to his anti-prohibitionist stance. He returned to private practice and died at his home near Uxbridge in 1924.

Example Output: b

Example Input: Question: Of the two Grandmasters, which one was older when they played Deen? Passage:Hergott made his first appearance in the Closed Canadian Chess Championship at Winnipeg 1986, also a Zonal year, where he scored 6.5/15 in a strong field. He tied for third the next year in the Closed at Baie-Comeau, with 5.5/9. He played in the British Championship, Swansea 1987, scoring 6/11 in a powerful field headed by Grandmaster Nigel Short; Canadian Masters, as Commonwealth citizens, are eligible to play in the British Championship. The next Canadian Zonal was Windsor 1989, where he made an even score with 7.5/15. He tied for fourth in the 1992 Zonal at Kingston, with 6.5/11. His best Zonal performance was Hamilton 1994, where he finished clear second, with 10.5/15, a point behind Grandmaster Kevin Spraggett. In the controversy-marred Closed at Ottawa 1995, Hergott tied for third place with 5/8. Hergott placed seventh in the 1996 Zonal at Toronto with 8/15.

Example Output:
a