Teacher:In this task, you're given a statement, further information available on a particular linked term from the statement, and a question. Your job is to generate the answer to the question by using the information provided. If there is no clear answer obtainable, output 'none'.
Teacher: Now, understand the problem? Solve this instance: Context: in 1980 he became a member of the National Academic Opera and Ballet Theatre of the Republic of Belarus Link Information: The National Academic Grand Opera and Ballet Theatre of the Republic of Belarus () is located in a park in the Trinity Hill district of Minsk. Local people call it the "Opierny Teatr" (Belarusian) or the "Opera and Ballet Theatre". It opened on 15 May 1933 Question: How many years after its founding did Polozov join the theatre in Belarus?
Student:
Answer: 47