TASK DEFINITION: Generate a correct and concise answer for the question based on the words in the context.
PROBLEM: Context : Traitor or Patriot (Original French-language title: Traître ou Patriote) is a Quebec documentary produced by the National Film Board of Canada (NFB) in 2000. 
Question : What studio produced Traitor or Patriot?

SOLUTION: National Film Board of Canada

PROBLEM: Context : The Leeds Corn Exchange is a Victorian building in Leeds, West Yorkshire, England, which was designed by Cuthbert Brodrick and completed in 1864. 
Question : The architect of Leeds Corn Exchange is whom?

SOLUTION: Cuthbert Brodrick

PROBLEM: Context : As demand for international rail travel declined and the shipping business became almost exclusively dependent on passenger and freight vehicle traffic, the ferry business as was incorporated as Sealink UK Limited in 1978, a wholly owned subsidiary of the British Railways Board (BRB), but still as part of the Sealink consortium. 
Question : What is Sealink's parent company?

SOLUTION:
British Railways Board