In this task, you're given a question, along with a context passage. The passage will not have a direct answer to the question, but can include some information and a clue for the answer. Assuming you can only obtain information about one entity in the passage, your job is to determine whether information from the passage can be used to answer the question. Indicate your choice as `a` for Yes or `b` for No.

Input: Consider Input: Question: What profession did Fritz Haber work in the year Barschall received his Ph.D? Passage:Barschall was born as Heinrich Hermann Barschall in Berlin, Germany; his father was a patent attorney who had received a Ph.D. in chemistry after studying with Nobel Laureates Emil Fischer and Fritz Haber. After beginning study in several universities in Germany, he emigrated to the United States in 1937 during the early Holocaust period; though raised as a Lutheran, he had some Jewish ancestry. He received his Ph.D. from Princeton University in 1940 under the direction of Rudolf Ladenburg; he also worked closely with John A. Wheeler. After a suggestion by Niels Bohr, he carried out in only a few days with fellow graduate student Morton H. Kanner the first demonstration of fission by fast neutrons and thorium and uranium. His thesis was on the interaction of fast neutrons with helium. In a paper with John A. Wheeler he reported the discovery of spin-orbit coupling in neutron scattering.


Output: b


Input: Consider Input: Question: How long did the battle where George was appointed colonel for last? Passage:Randall enlisted as a private in the 4th Pennsylvania Volunteer Infantry in the April 1861. He then accepted appointment to the 4th U.S. Infantry as second lieutenant in October. He served in New York and Washington, D.C., and in the field with the Army of the Potomac. He was a second lieutenant at the Siege of Yorktown, Battle of Gaines' Mill, Battle of Malvern Hill, Second Bull Run (where he commanded Company C), and Fredericksburg; and a first lieutenant at the Battle of the Wilderness. He was appointed a brevet captain for gallant service in the Battle of Antietam. He served as a major in the 14th New York Heavy Artillery Regiment, part of Major General Ambrose Burnside's IX Corps on the Richmond-Petersburg Front in 1864, and was commander of the regiment at the Battle of the Crater. The Dansville Advertiser reported on 7 September that he assumed command of the regiment on 18 August. This article also reports that he was wounded in the battle on 19 August. He was appointed a brevet lieutenant colonel, and then colonel for gallantry in the Battle of Fort Stedman. He mustered out of the Volunteer service on 26 August, and was appointed captain in the 4th US Infantry on 23 September 1865. Subsequently, he served at Davids' Island Military Reservation, New York Harbor, where he was in December 1867.


Output: b


Input: Consider Input: Question: Did Osornio Martinez stay in Mexico after he married Maria Elvira Camarena Aldana? Passage:He attended the Colegio San Luis Gonzaga and afterwards the Colegio Civil of Querétaro from 1883 to 1887. In 1892 he began his studies at the Escuela Nacional de Medicina (currently Faculty of Medicine of the UNAM) in Mexico City and graduated in 1893. As an officer candidate he completed the Escuela Práctica Médico-Militar (predecessor of the Escuela Médico Militar) at the military teaching hospital and made his specialty training in ophthalmology in the United States and in Canada from 1893 to 1895. In 1896 he married María Elvira Camarena Aldana and worked in Aguascalientes. He also was a liberal thinking politician, active in the city of Aguascalientes from 1903 to 1911 and as Deputy Governor of Aguascalientes from 1910 to 1911. From 1914 he served as a military surgeon on the side of revolutionary forces during the revolution, was promoted to the rank of Brigadier General (MC) in 1916. From June 1, 1916 to December 11, 1917 as well as from December 4, 1920 to December 16, 1934 he served as head of the medical branch in the Secretaría de Guerra y Marina. He was one of the founders of the Escuela Constitucionalista Médico Militar where he was director and taught as Professor of pathology, medical therapy and ophthalmology. From 1933 to 1934 he was director of the journal "Gaceta Médico Militar", the organ of the Mexican military branch. He died in Mexico City.



Output: b