You will be given a definition of a task first, then some input of the task.
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.

Question: Which network has aired Teletubbies the longest? Passage:Teletubbies has been aired in over 120 countries in 45 different languages. In the United States, the series airs on Nickelodeon as part of the Nick Jr. block. Episodes are also released through the Nick Jr. mobile application and on-demand services. The original series is available as part of the Noggin subscription service in North America. It had aired on PBS Kids from 6 April 1998 to 29 August 2008. BBC Worldwide channels carry the series in most of Africa, Asia and Poland. A Spanish dub airs on Clan in Spain. In Greece, the series airs on Nickelodeon Greece. NPO Zappelin carries the show in the Netherlands and MTVA airs it in Hungary. In Australia and New Zealand, the series airs on CBeebies Australia and ABC Kids. JimJam's Benelux feed airs the series and Ultra airs it in Serbia. Teletubbies also airs on SIC in Portugal and e-Junior in the Middle East.

Output:
a