In this task, you're given a passage, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both passage and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the passage or linked information.
One example is below.
Q: 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,
. Link Information: Operation Market Garden was a failed World War II military operation fought in the Netherlands from 17 to 25 September 1944. Answer: from 17 to 25 September 1944
A: When did the operation during which the 704th dropped supplies to allied troops near Nijmegen begin?
Rationale: The passage describes the 704th's actions during Operation Market Garden, and the answer specifies when the operation happened.
Q: Passage: Walter Ehrengott Trautzsch was born at Lengefeld, a small industrial town in the mining region south of Chemnitz, and close to the frontier with Bohemia. His parents worked in the weaving trade. His father is also described as a building worker in at least one source. Walter was the sixth of his parents' seven recorded children. On leaving school, Walter Trautzch successfully completed an apprenticeship in industrial metal forming (als "Metalldrücker"), which was the trade from which he would earn his living, working in various German towns and cities, till 1929. He joined the recently formed Communist Party in June 1923, and participated in the Hamburg Uprising in October of that year. That led to his imprisonment, but he was released in December 1923. He spent six months in Switzerland, but then in 1926 found work closer to home, in Chemnitz. In 1929 his period as an itinerant labourer came to an end when he returned to Lengefeld. A period of unemployment followed, as Germany was badly impacted the backwash from the Wall Street Crash.
 Link Information: A new KPD leadership more favorable to the Soviet Union was elected in 1923. This leadership, headed by Ernst Thälmann, Answer: Ernst Thälmann
A:
Who was the leader of the Communist Party in 1923?