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.

Ex Input:
Question: How long passed between the Potsdam Declaration and the San Francisco Peace Treaty signing? Passage:The Allied occupation of Japan at the end of World War II was led by General Douglas MacArthur, the Supreme Commander of the Allied Powers, with support from the British Commonwealth. Unlike in the occupation of Germany, the Soviet Union was allowed little to no influence over Japan. This foreign presence marks the only time in Japan's history that it has been occupied by a foreign power. At MacArthur's insistence, Emperor Hirohito remained on the imperial throne. The wartime cabinet was replaced with a cabinet acceptable to the Allies and committed to implementing the terms of the Potsdam Declaration, which among other things called for the country to become a parliamentary democracy. Under MacArthur's guidance, the Japanese government introduced sweeping social reforms and implemented economic reforms that recalled American "New Deal" priorities of the 1930s under President Roosevelt. The Japanese constitution was comprehensively overhauled and the Emperor's theoretically-vast powers, which for many centuries had been constrained by conventions that had evolved over time, became strictly limited by law. The occupation, codenamed Operation Blacklist, was ended by the San Francisco Peace Treaty, signed on September 8, 1951, and effective from April 28, 1952, after which Japan's sovereigntywith the exception, until 1972, of the Ryukyu Islands was fully restored.


Ex Output:
b


Ex Input:
Question: How many Senators voted for the law that assigned Thebacon and all of its salts the control number 9737? Passage:Thebacon (INN; pronounced ), or dihydrocodeinone enol acetate, is a semisynthetic opioid that is similar to hydrocodone and is most commonly synthesised from thebaine. Thebacon is a derivative of acetyldihydrocodeine, where only the 6–7 double bond is saturated. Thebacon is marketed as its hydrochloride salt under the trade name Acedicon, and as its bitartrate under Diacodin and other trade names. The hydrochloride salt has a free base conversion ratio of 0.846. Other salts used in research and other settings include thebacon's phosphate, hydrobromide, citrate, hydroiodide, and sulfate. The US DEA Administrative Controlled Substance Control Number assigned by the Controlled Substances Act 1970 for thebacon and all of its salts is 9737.


Ex Output:
a


Ex Input:
Question: How long was the reign of the person who claimed all the land of England at the Norman conquest of England? Passage:At the Norman conquest of England, all the land of England was claimed as the personal possession of William the Conqueror under allodial title. The monarch thus became the sole "owner" of all the land in the kingdom, a position which persists to the present day. He then granted it out to his favoured followers, who thereby became tenants-in-chief, under various contracts of feudal land tenure. Such tenures, even the highest one of "feudal barony", never conferred ownership of land but merely ownership of rights over it, that is to say ownership of an estate in land. Such persons are therefore correctly termed "land-holders" or "tenants" (from Latin teneo to hold), not owners. If held freely, that is to say by freehold, such holdings were heritable by the holder's legal heir. On the payment of a premium termed feudal relief to the treasury, such heir was entitled to demand re-enfeoffment by the king with the fee concerned.


Ex Output:

b