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: What years did the series run that included Dr. Radek Zelenka as a character? Passage:Dr. Radek Zelenka is a fictional character of a scientist in the television series Stargate Atlantis, portrayed by David Nykl. He is a member of the original expedition from Earth to the Ancient city of Atlantis in the Pegasus galaxy, which he joined after turning down a job at Masaryk University in his home country Czech Republic. His expertise on Ancient technology is only surpassed by Dr. Rodney McKay, with whom he shares a friendly rivalry. Zelenka's planned one-time appearance in the season 1 episode "Thirty-Eight Minutes" was followed by a recurring role for expository scenes with McKay and the leader of the expedition. Zelenka has since appeared in approximately half of each season's episodes and also appeared in the crossover episode "The Pegasus Project" of Stargate SG-1. The series finale of Atlantis, "Enemy at the Gate", marks his last appearance. For his portrayal of Radek Zelenka, David Nykl was nominated for a 2005 Leo Award in the category "Dramatic Series: Best Supporting Performance by a Male".


b