Generate a correct and concise answer for the question based on the words in the context.

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?
National Film Board of Canada

Context : Solar Pons is a fictional detective created by August Derleth as a pastiche (imitation) of Arthur Conan Doyle's Sherlock Holmes. 
Question : The Solar Pons is based upon what?
Sherlock Holmes

Context : Based on the TR-77-580 (Romanian-built version of the Soviet T-55 tank), the TR-85 tank was developed from 1978 to 1985 and produced from 1986 until 1990. 
Question : Which was the official year for the approval of TR-85?

1986