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.

Question: How long had Jeffrey Ullman been teaching at Stanford the year Mairson got his B.A.? Passage:Mairson received a B.A. in Mathematics from Yale University in 1978 and a Ph.D. in Computer Science from Stanford University in 1984 under the supervision of Jeffrey Ullman. His Ph.D. thesis, The Program Complexity of Searching a Table, won the Machtey Award at the 1983 IEEE Symposium on Foundations of Computer Science (FOCS). Mairson was a Postdoctoral researcher at INRIA Rocqencourt from 1984 to 1985, at Stanford University in 1985, and at the University of Oxford in 1986. He held a Visiting Professor position from 1999 to 2001 at Boston University. From 2005 to 2007, Mairson has served as the Chair of the Faculty Senate at Brandeis. He is currently an Associate Editor of the journal Logical Methods in Computer Science and Information and Computation, and sits on the editorial board of Higher-Order and Symbolic Computation.

b

Question: How many times had Namibia participated in the ICC Intercontinental Cup when Bari made his first-class debut? Passage:Bari was born in Dubai. Having earlier represented his country at under-15 and under-17 level, he played for the UAE under-19s at the 2005 ACC Under-19 Cup in Nepal and the 2007 ACC Under-19 Elite Cup in Malaysia. His performance at the 2005 tournament included figures of 3/31 against Kuwait and 2/20 against Malaysia, while at the 2007 tournament he top-scored with 45 against Singapore. Bari made his senior debut for the UAE in November 2006, appearing against Nepal in an ACC Premier League match. His first-class debut came the following month, in an ICC Intercontinental Cup match against Namibia. He took a five-wicket haul, 5/130, in Namibia's only innings, but his team lost by an innings and 149 runs. Bari has since made another three Intercontinental Cup appearances, playing against Ireland in 2007 and against Kenya in 2008 and 2011. He also represented the UAE at the 2007 and 2013 ACC Twenty20 Cups.

b

Question: What countries was the Lublin-Brest Offensive fought in? Passage:In November 1942 he took command of the newly formed 102nd Rifle Division and led it in Operation Kutuzov, the Battle of the Dnieper and the Gomel-Rechitsa Offensive. In December 1943 he was appointed commander of the 29th Rifle Corps and fought in the Operation Bagration and the LublinBrest Offensive. In September, Andreyev became commander of the 4th Guards Rifle Corps, defending the Magnuszew bridgehead. In November he was appointed deputy commander of the 47th Army and in December given command of the 125th Rifle Corps. He led the corps in the VistulaOder Offensive, East Pomeranian Offensive and the Battle of Berlin. In April 1945 he was awarded the title Hero of the Soviet Union for his leadership in the capture of Warsaw. Postwar, he commanded the 4th Guards Rifle Corps, 7th Guards Rifle Corps, 19th Rifle Corps, 3rd Shock Army, 28th Army and Voronezh Military District. He was then Warsaw Pact representative to the Albanian People's Army and Czechoslovak People's Army. After leading the Military Institute of Foreign Languages, Andreyev retired in 1973. He lived in Moscow and died in 1983.
b