TASK DEFINITION: Generate a correct and concise answer for the question based on the words in the context.
PROBLEM: 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?

SOLUTION: 1986

PROBLEM: Context : The Kano riot of 1953 refers to the riot, which broke out in the ancient city of Kano, located in Northern Nigeria, on 1 May 1953. 
Question : The point in time of Kano riot of 1953 was what?

SOLUTION: 1 May 1953

PROBLEM: Context : Casey's Shadow is a 1978 drama Metrocolor film directed by Martin Ritt and starring Walter Matthau. 
Question : Who are the cast members of Casey's Shadow?

SOLUTION:
Walter Matthau