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 Q]: Question: In what city did Steinmetz earn his B.S. degree? Passage:Steinmetz is a specialist in the areas of cosmology, the formation and evolution of galaxies and computational astrophysics. Steinmetz has a B.S. in Mathematics and Physics from the Saarland University (1988) and a M.S. in Physics from the Technical University of Munich (1991). He received his Ph.D. in Physics in 1993 at the Max Planck Institute for Astrophysics in Garching. For his thesis "On the formation and evolution of galaxies" he was awarded the Otto Hahn Medal of the Max Planck Society. He was a postdoctoral fellow at the Max Planck Institute for Astrophysics and at the Department for Astronomy at the University of California, Berkeley. In 1996 he joined the faculty of Steward Observatory at the University of Arizona in Tucson. Since 2002 he has been the director of the Astrophysical Institute Potsdam (AIP) and professor at University of Potsdam. He also holds a position of adjunct professor at Steward Observatory.

[EX A]: b

[EX Q]: Question: Who was the other finalist in the 1930 Allan Cup other than the team Roche was on? Passage:Roche was born in Prescott, Ontario, but moved to Montreal where he played junior hockey for the Montreal Victorias and other teams. He moved up to senior hockey for the Montreal Hockey Club and played for their Allan Cup-winning squad of 1930. He signed with the Maroons of the NHL, playing for the Maroons and the Windsor Bulldogs until 1933. He was released by the Maroons and signed with the Bruins in January 1933 only to be traded to the Senators one month later. In his one full season with the Senators in 193334 he showed a scoring touch, scoring 13 goals and 16 assists in 45 games. The next season, the Senators relocated to St. Louis to become the Eagles. Roche was traded twice in 193435; from St. Louis to Buffalo, then to the Red Wings. That marked his last season in the NHL, as he subsequently played for various minor-league pro teams until 1942.

[EX A]: a

[EX Q]: Question: Who is the current mayor of the city located on the northern Great Plains that the Yellowstone River flow through? Passage:The river rises in northwestern Wyoming in the Absaroka Range, on the Continental Divide in southwestern Park County. The river starts where the North Fork and the South Fork of the Yellowstone River converge. The North Fork, the larger of the two forks, flows from Younts Peak. The South Fork flows from the southern slopes of Thorofare Mountain. The Yellowstone River flows northward through Yellowstone National Park, feeding and draining Yellowstone Lake, then dropping over the Upper and Lower Yellowstone Falls at the head of the Grand Canyon of the Yellowstone within the confines of the park. After passing through the Black Canyon of the Yellowstone downstream of the Grand Canyon, the river flows northward into Montana between the northern Absaroka Range and the Gallatin Range in Paradise Valley. The river emerges from the mountains near the town of Livingston, where it turns eastward and northeastward, flowing across the northern Great Plains past the city of Billings.

[EX A]:
a