Definition: 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.
Input: Question: How many years had St. Norbert held the position of archbishop when he was visited by Vicelinus? Passage:Vicelinus was called to Bremen to act as teacher and principal of the school, and was offered a canonry by Archbishop Frederick of the Archbishopric of Hamburg-Bremen. In 1122 he may have gone to Laon to complete his studies under Abelard. In 1126, Vicelinus decided to travel to Madgeburg, in order to see St. Norbert, who at that time was the archbishop. He hoped that St. Norbert would ordain him a priest and he could begin missionary work among the Slavs. For one reason or another this plan failed and so Vicelinus returned to Bremen, where Bishop Albero ordained him. Hamburg-Bremen's Archbishop Adalbero sent him among the Polabian Slavs, and in the fall of 1126 Henry, Prince of the Obotrites, gave him a church in Liubice, near the site of the later Lübeck. At the death of Henry (22 March 1127) Vicelinus returned to Bremen, and was appointed pastor at Wippenthorp. This gave him an opportunity to work among the Wagrians and neighbouring Obotrites.


b