Teacher: In this task, you're given a question, along with a context passage which has extra information available on certain terms mentioned in it. Your job is to determine which sentence(s) from the passage can be used to search for further information needed to answer the question.
Teacher: Now, understand the problem? If you are still confused, see the following example:
Question: When did the operation during which the 704th dropped supplies to allied troops near Nijmegen begin? Passage: The group was occasionally diverted from strategic missions to carry out air support and interdiction missions. It supported Operation Overlord, the invasion of Normandy by attacking transportation targets, including bridges, along with airfields and strong points in France. On D Day, the squadron and the rest of the 446th Group led the first heavy bomber mission of the day. The 446th aided ground forces at Caen and Saint-Lô during July by hitting bridges, gun batteries, and enemy troops. During Operation Market Garden, the attempt to seize a bridgehead across the Rhine in the Netherlands, the 704th dropped supplies to allied troops near Nijmegen. It struck lines of communications during the Battle of the Bulge. During Operation Varsity in March 1945, it supplied ground and airborne troops near Wesel. The squadron flew its last combat mission on 25 April 1945 against Salzburg, Austria. The group had flown 273 missions and had lost 58 aircraft during the war,
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Solution: During Operation Market Garden, the attempt to seize a bridgehead across the Rhine in the Netherlands, the 704th dropped supplies to allied troops near Nijmegen.
Reason: The passage describes the 704th's actions during Operation Market Garden.

Now, solve this instance: Question: How long had the Communist Party of the Soviet Union been in power when Khrushchev gave a speech to the Twentieth Party Congress? Passage:On February 25, 1956, Khrushchev gave a clandestine speech to the Twentieth Party Congress of the Communist Party of the Soviet Union, which was entitled, "On the Cult of Personality and Its Consequences", which denounced Stalin and his protégés. Khrushchev charged Stalin with fostering a personality cult, despite maintaining support for the ideals of communism. The speech was highly critical of Stalin and his reign of terror, primarily denouncing the purges of the Soviet military and Communist Party, which had taken place during the latter part of the 1930s. The speech brought forth several accusations, notably those concerning the Moscow Trials, where rulings were made, based on forced confessions, which were obtained through torture. Judicial decisions were determined, based on liberal interpretations of Article 58 of the Russian SFSR Penal Code, which was introduced in 1927, in order to arrest individuals suspected of counter-revolutionary activities. Due process, in accordance with Soviet law, was often dismissed and replaced with summary proceedings issued by institutional commissions known as NKVD troikas, who issued sentences to the accused without representation, defense, or trial.

Student:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
On February 25, 1956, Khrushchev gave a clandestine speech to the Twentieth Party Congress of the Communist Party of the Soviet Union, which was entitled, "On the Cult of Personality and Its Consequences", which denounced Stalin and his protégés