Definition: In this task, you're given a question, along with a context passage which has extra information available on certain terms mentioned in it, i.e., the proper nouns in the passage. Your job is to determine whether information from more than one term is needed to answer the question. Indicate your choice as `a` for Yes or `b` for No.
Input: Question: How many states did Tates teach college law in? Passage:Tatel received his Bachelor of Arts degree from the University of Michigan and his Juris Doctor from the University of Chicago Law School. Following law school, he served as an instructor at the University of Michigan Law School and then joined Sidley Austin in Chicago. Since then, he served as founding director of the Chicago Lawyers' Committee for Civil Rights Under Law, Director of the National Lawyers' Committee for Civil Rights Under Law, and Director of the Office for Civil Rights of the United States Department of Health, Education, and Welfare during the Carter Administration. Returning to private practice in 1979, Tatel joined Hogan & Hartson, where he founded and headed the firm's education practice until his appointment to the D.C. Circuit. While on sabbatical from Hogan & Hartson, Tatel spent a year as a lecturer at Stanford Law School. He also previously served as Acting General Counsel for the Legal Services Corporation.


a