Instructions: 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: Which main composer did Rouvas work with for the creation of Kati Apo Mena? Passage:For his previous album, Irthes, Rouvas collaborated almost exclusively with Dimitris Kontopoulos, who was also commissioned to write all three of Rouvas' candidate songs for his participation in the Eurovision Song Contest 2009, as well as the composer and producer of his album, with the exception of one track. Working namely with one main composer is something that Rouvas had not done since Kati Apo Mena (1998) and not completely exclusively since Tora Arhizoun Ta Dyskola (1996). For Parafora, Rouvas reverted to using several songwriters and producers. The majority of the songwriters and producers are new collaborators and recent hit makers relatively new to the music industry. Kontopoulos, who first collaborated with Rouvas for To Hrono Stamatao (2003), resumed his role as a composer, producer, arranger, programmer, and instrumentalist, with eight contributions to the album, including the singles "Spase To Hrono" and the title track. Others who have never previously collaborated with Rouvas include Playmen, Beetkraft, Antonis Skokos, Greek-German Leonidas "Freakchild" Chantzaras, who composed "Nekros Okeanos" and produced "Emena Thes", and Dimitris Fakos who wrote both its music and lyrics. Songwriters who exclusively contributed lyrics to the album include Natalia Germanou, who first collaborated with Rouvas on Min Andistekese (1992), Pigi Konstantinou and Giannis Rentoumis who first collaborated with the artist on Irthes, and new collaborators Sunny Baltzi, Vagia Kalantzi, and Nikos Kostidakis, who wrote "Parafora".

Output:
b