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.

Q: 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.


A: b
****
Q: Question: How old is the city that US route 13 starts in? Passage:U.S. Route 13 (US 13) is a U.S. highway running from Fayetteville, North Carolina north to Morrisville, Pennsylvania. In the U.S. state of Delaware, the route runs for . It traverses the entire length of the state from the Maryland state line in Delmar, Sussex County to the Pennsylvania state line in Claymont, New Castle County. US 13 connects many important cities and towns in Delaware, including Seaford, Dover, and Wilmington. The entire length of US 13 in Delaware is a multilane divided highway with the exceptions of the segment through Wilmington and parts of Philadelphia Pike in Claymont. Between the Maryland border and Dover, US 13 serves as one of the main north-south routes across the Delmarva Peninsula. From Dover north to the Wilmington area, the route is followed by the limited-access Delaware Route 1 (DE 1) toll road, which crosses the route several times and has multiple interchanges with it. US 13 bypasses downtown Wilmington to the east before it heads northeast of the city parallel to Interstate 495 (I-495) and the Delaware River to Claymont. US 13 is the longest numbered highway in the state of Delaware.


A: b
****
Q: Question: Is the Division 1 composed of all youth teams? Passage:Pearce's first experience of senior football came in the Northern NSW State League Division 1, for Newcastle Jets youth, where coach (and former Australian international) Clayton Zane praised Pearce's potential and passing ability. For the 2014 National Premier Leagues season, Pearce moved to Broadmeadow Magic. In October 2014, it was announced that Pearce had joined Central Coast Mariners' youth squad to play in the 2014–15 National Youth League. He was called up to the senior squad for the first time and was an unused substitute against Sydney FC in an A-League match in November 2014 following an injury to Liam Reddy. Reddy's departure in late 2015 and suspension and international selection for Paul Izzo led Pearce and fellow young 'keeper Tom Heward-Belle to be called up to the senior side. He made his A-League debut for the Mariners in a loss to Western Sydney Wanderers in April 2016. Pearce was in A-League action again a week later, coming on as an early substitute after Paul Izzo suffered a concussion in the opening minute of an eventual loss to Newcastle Jets. On 6 April 2017, he signed a one-year professional contract with Central Coast Mariners.


A:
b
****