instruction:
You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For consistency, answers should be in all lower cased letters.
question:
Category: THE 1980s 
Clue: In 1985 the PMRC wanted these labeled for "Parental Guidance" if they contained explicit lyrics
answer:
records


question:
Category: THE 16th CENTURY 
Clue: In the 1569 Union of Lublin, Zygmunt II united Lithuania & this country
answer:
poland


question:
Category: THE MISSIVES OF OCTOBER 
Clue: Oct. 24, 1648: Dear Johann, I can't believe this long war is over now that the Peace of Westphalia has been concluded
answer:

the thirty years\' war