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: In what year was Columbia University founded? Passage:Columbia (; ) is the female personification of the United States. It was also a historical name used to describe the Americas and the New World. It has given rise to the names of many persons, places, objects, institutions and companies; for example: Columbia University, the District of Columbia (the national capital of the United States), and the ship Columbia Rediviva, which would give its name to the Columbia River. Images of the Statue of Liberty largely displaced personified Columbia as the female symbol of the United States by around 1920, although Lady Liberty was seen as an aspect of Columbia. The District of Columbia is named after the personification, as is the traditional patriotic hymn "Hail Columbia", which is the official vice presidential anthem of the United States Vice President.


Ex Output:
b


Ex Input:
Question: Who is the mayor of the town Archer was born in? Passage:Born in Densmore, Kansas, Archer moved to Topeka, Kansas where he attended public high school. Archer received a Bachelor of Arts degree in English literature from Yale University in 1952 and a Juris Doctor, with honors, from George Washington University Law School in 1954. He served as a First Lieutenant in the Judge Advocate General's Office of the United States Air Force from 1954 to 1956. He entered private practice in Washington, D.C., as an associate in the law firm of Hamel, Park, McCabe and Saunders from 1956 to 1960 and a partner from 1960 to 1981. Archer served as Assistant Attorney General in charge of the United States Department of Justice Tax Division from 1982 to 1984.


Ex Output:
a


Ex Input:
Question: Who were the contemporaries of the philosopher Timon was a pupil of? Passage:Timon of Phlius ( ; , , ; BC – c. 235 BC) was a Greek Pyrrhonist philosopher, a pupil of Pyrrho, and a celebrated writer of satirical poems called Silloi (). He was born in Phlius, moved to Megara, and then he returned home and married. He next went to Elis with his wife, and heard Pyrrho, whose tenets he adopted. He also lived on the Hellespont, and taught at Chalcedon, before moving to Athens, where he lived until his death. His writings were said to have been very numerous. He composed poetry, tragedies, satiric dramas, and comedies, of which very little remains. His most famous composition was his Silloi, a satirical account of famous philosophers, living and dead; a spoudaiogeloion in hexameter verse. The Silloi has not survived intact, but it is mentioned and quoted by several ancient authors.


Ex Output:

b