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 simplicity, answers should be in all lower cased letters.
question:
Category: VINCENT 
Clue: With Curt Gentry, he wrote "Helter Skelter: The True Story of the Manson Murders"
answer:
vincent bugliosi


question:
Category: HISTORIC EUROPEAN LEADERS 
Clue: On June 15, 1961 Walter Ulbricht assured journalists that "No one intends to build a wall" dividing this city
answer:
berlin


question:
Category: 4 "N" WORDS & PHRASES 
Clue: Tolstoy was partly inspired to write this novel after a neighbor threw herself under a train
answer:

"anna karenina"