Instructions: 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 long had Cochrane Theatre been in existence for the year Johnson began working as a professional theatre director? Passage:Karena has worked as a professional theatre director since 1997. Her work include "40" by Angie LeMar at Hackney Empire Crossings by Julie McNamara at Cochrane Theatre "Safe" by David Herminstien at West Yorkshire Playhouse"Sweet Yam Kisses" which was conceived by her and written by Courttia Newland and Pat Cumper at the Lyric Hammersmith,"The Bridge" by Pedro Obaseki, an international co-production between Oval House Theatre and Don Pedro productions Nigeria; "The Oddest Couple" by Geoff Aymer at the Theatre Royal Stratford East; "Vengeance" by Wayne Buchanan on a National Tour; "Yerma" by Federico Garcia Lorca at the Young Vic/ Jerwood Space; "The Key Game" by Pat Cumper at the Riverside Studios; "The Front Room" by Jenny Davis on a National Tour; "Under Their Influence" by Wayne Buchanan at the Tricycle Theatre; "Angie Baby" by Rommie Smith at the Young Vic; "Gods and Bad Guys" by Tunde Euba; "Two" by Jim Cartwright; and EMMA Award nominated premier production of Vengeance by Wayne Buchanan at the Oval House Theatre.

Output:
b