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 many miles separate Bridge of Weir and Roker Park? Passage:Gallacher was born in Bridge of Weir and started his footballing career Linwood St Conval and Bridge of Weir before moving to Sunderland. He made his debut for Sunderland on 21 September 1929 against Arsenal in a 1–0 loss at Roker Park. He was part of the 1937 FA Cup Final winning side against Preston North End. In his career at Sunderland, Gallacher made 309 appearances and scored 108 goals in all competitions. He helped the "Black Cats" to win the First Division in 1935–36, scoring 20 goals in that title winning season. He then moved on to Stoke City in December 1938 just before the World War II. He only managed to play four matches for Stoke due to injury and left at the end of the 1938–39. He then played in Ireland for Coleraine and Cork United before signing for Cheltenham Town in September 1948 playing 8 games before leaving.

Example Output: a

Example Input: Question: How many days did one of the largest battles in medieval Europe last? Passage:The Polish–Lithuanian–Teutonic War or Great War occurred between 1409 and 1411, pitting the allied Kingdom of Poland and Grand Duchy of Lithuania against the Teutonic Knights. Inspired by the local Samogitian uprising, the war began by Teutonic invasion of Poland in August 1409. As neither side was ready for a full-scale war, Wenceslaus IV of Bohemia brokered a nine-month truce. After the truce expired in June 1410, the military-religious monks were decisively defeated in the Battle of Grunwald (Tannenberg), one of the largest battles in medieval Europe. Most of the Teutonic leadership was killed or taken prisoner. While defeated, the Teutonic Knights withstood the siege on their capital in Marienburg (Malbork) and suffered only minimal territorial losses in the Peace of Thorn (1411). Territorial disputes lasted until the Peace of Melno of 1422. However, the Knights never recovered their former power and the financial burden of war reparations caused internal conflicts and economic decline in their lands. The war shifted the balance of power in Central Europe and marked the rise of the Polish–Lithuanian union as the dominant power in the region.

Example Output: b

Example Input: Question: How many cylinders was the Skytrain's engine? Passage:The Dufek Coast is that portion of the coast along the southwest margin of the Ross Ice Shelf between Airdrop Peak on the east side of the Beardmore Glacier and Morris Peak on the east side of Liv Glacier. It was named by the New Zealand Antarctic Place-Names Committee in 1961 after Rear Admiral George J. Dufek, United States Navy, who served under Rear Admiral Richard E. Byrd with the United States Antarctic Service, 1939–41, and as commander of the Eastern Task Force of U.S. Navy Operation Highjump, 1946–47. He was Commander of U.S. Naval Support Force Antarctica, 1954–59, a period in which the following American science stations were established: McMurdo Station, Little America V, Byrd Station, South Pole Station, Wilkes Station, Hallett Station and Ellsworth Station. United States Navy ships, aircraft, and personnel under his command provided broad logistical support to research and survey operations, including aerial photographic missions to virtually all sectors of Antarctica. On October 31, 1956, Dufek in the ski-equipped R4D Skytrain aircraft Que Sera Sera (pilot Lieutenant Commander Conrad Shinn), flew from McMurdo Sound via Beardmore Glacier to make the first airplane landing at the South Pole.

Example Output:
b