Definition: 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.
Input: Question: How many cylinders did the engine of the Fokker have? Passage:Parschau was assigned the Fokker A.III aircraft bearing both the Fokker factory serial number 216 and the IdFlieg military serial number of A.16/15. This airplane had previously been flown by Oberleutnant Waldemar von Buttlar. This unarmed monoplane had been privately purchased in 1913 by von Buttlar. It was requisitioned by the Fliegertruppe and von Buttlar was commissioned as an officer in the German Army at the outbreak of hostilities. The airplane was painted in a shade of green that was the same as that used by von Buttlar's previous Marburg-based Jäger Regiment 11. Parschau had served with the same, Brieftauben-Abteilung Ostende unit, abbreviated as BAO in German military communications of the time, in Belgium as Oberleutnant von Buttlar did in November 1914, where the two German officers could have first made contact. As A.16/15 still bore the green color of von Buttlar's old unit, the aircraft became distinctive as Parschau's 'Green Machine', right from the outbreak of World War I. Parschau flew this machine on a roving commission for nearly a year, serving with FFAs 22 and 42 and the aforementioned "BAO" unit, which was actually a group of four FFA units operating as one for the Oberste Heeresleitung or OHL, the World War I German Army's High Command office. In this period, Parschau flew his distinctive machine on the Champagne front during October and November 1914. Following this were periods in Flanders and Alsace-Lorraine before Parschau was posted first to West Prussia and then on to Galicia on the Eastern Front. His travels were marked on the Fokker's fuselage. In late May 1915, this airplane was the first one to be fitted with a workable synchronization gear: the Fokker Stangensteuerung synchronizer, along with a Parabellum MG 14 machine gun for its armament. This airplane functioned as the prototype Fokker Eindecker for Parschau's use and combat evaluation.


b