instruction:
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:
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.

answer:
b


question:
Question: What is the latitude and longitude of the town where Grandage was born? Passage:Grandage was born in Yorkshire, England, and raised in Penzance, Cornwall, where his parents ran a family business. He was educated at the Humphry Davy Grammar School before training as an actor at the Royal Central School of Speech & Drama through 1984. He spent twelve years working as an actor for companies such as the Royal Exchange and the Royal Shakespeare Company and was also a member of National Youth Theatre before turning to directing. He made his directorial debut in 1996 with a production of Arthur Miller's The Last Yankee at the Mercury Theatre, Colchester. In 1998 he was invited by Sheffield Theatres to direct Twelfth Night, his first Shakespeare production. In the same year he made his London directorial debut at the Almeida Theatre with a production of Shaw's The Doctor's Dilemma.

answer:
a


question:
Question: Of the two longest runways in Ventura County, which one's facility was built last? Passage:San Nicolas Island (Tongva: Haraasnga) is the most remote of California's Channel Islands, located 61 miles (98 km) from the nearest point on the mainland coast. It is part of Ventura County. The 14,562 acre (58.93 km or 22.753 sq mi) island is currently controlled by the United States Navy and is used as a weapons testing and training facility, served by Naval Outlying Field San Nicolas Island. The uninhabited island is defined by the United States Census Bureau as Block Group 9, Census Tract 36.04 of Ventura County, California. The Nicoleño Native American tribe inhabited the island until 1835. As of the 2000 U.S. Census, the island has since remained officially uninhabited, though the census estimates that at least 200 military and civilian personnel live on the island at any given time. The island has a small airport, though the 10,000 foot runway is the second longest in Ventura County (slightly behind the 11,102 ft. at the Naval Air Station Point Mugu). Additionally, there are several buildings including telemetry reception antennas.

answer:

a