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: Which countries made up the group that invaded Yugoslavia? Passage:On 6 April 1941, Yugoslavia was invaded from all sides by the Axis powers, led by German forces. Stojanović was assigned as a physician to an infantry battalion based in Banja Luka. For several days after the invasion this battalion moved toward Dalmatia, before it completely disintegrated without fighting the enemy, and Stojanović returned to Prijedor. The Royal Yugoslav Army capitulated on 17 April, and the Axis powers proceeded to dismember Yugoslavia. Almost all of modern-day Croatia, all of modern-day Bosnia-Herzegovina, and parts of modern-day Serbia were combined into a puppet state called the Independent State of Croatia (, NDH). It was an "Italian-German quasi-protectorate", which was controlled by the fascist Ustaše led by Ante Pavelić. One of its policies was to eliminate the ethnic Serb population of the NDH through mass killings, expulsions and forced assimilation, and many Serbs fled from the NDH to the German-occupied territory of Serbia.


Ex Output:
b


Ex Input:
Question: How many years did the person who possibly encouraged Eumenes to revolt reign? Passage:Although nominally under Seleucid control, Pergamon under Philetaerus enjoyed considerable autonomy. However, upon his succession, Eumenes, perhaps with the encouragement of Ptolemy II, who was at war with the Seleucids, revolted, defeating the Seleucid king Antiochus I near the Lydian capital of Sardis in 261 BC. He was thus able to free Pergamon, and greatly increase the territories under his control. In his new possessions, he established garrison posts in the north at the foot of Mount Ida called Philetaireia after his adoptive father, and in the east, northeast of Thyatira near the sources of the river Lycus, called Attaleia after his grandfather, and he extended his control south of the river Caïcus to the Gulf of Cyme as well. Demonstrating his independence, he began to strike coins with the portrait of Philetaerus, while his predecessor had still depicted Seleucus I Nicator.


Ex Output:
b


Ex Input:
Question: How many songs are on Dio's debut album? Passage:Former Black Sabbath members vocalist Ronnie James Dio and drummer Vinny Appice formed Dio in October 1982 in the United States with bassist Jimmy Bain and guitarist Vivian Campbell. The band released their debut album, Holy Diver in May 1983. Since Ronnie James Dio and Jimmy Bain had played keyboards on the record, they recruited keyboardist Claude Schnell for live shows in 1983 and the following Holy Diver tour. Claude Schnell would later become a full member of Dio, and the band's first recorded effort as a quintet would be 1984's The Last in Line. The band proceeded to release Sacred Heart in 1985 and The Dio E.P. in 1986 before Campbell was fired from the band. The remaining members were joined by guitarist Craig Goldy to release Dream Evil in 1987 before the departure of Bain, Appice and Schnell. They would not play in Dio together again, however Appice would return to the band between 1993 and 1998 as well as Bain between 1999 and 2004.


Ex Output:

b