This task involves creating questions from a given passage that involve some kind of complex reasoning (including numerical reasoning).
The generated questions must require looking at more than one part of the passage to answer. Try to use a variety of reasoning types in your questions (some of the sample reasoning types are illustrated in the 'positive examples' field) and also have a variety of answer types (spans, numbers, dates). A span is a continuous phrase taken directly from the passage or question. In such questions, the answer spans are recommended to be five words. Questions with answer type "number", are expected to start with "How many". For instance, "How long did an event last?" can be phrased as "How many years did an event last?". To increase diversity, try to create more questions for which the answer will be multiple spans. Please create questions that require AT LEAST 2 arithmetic operations as illustrated in the 'positive examples' field. You are encouraged to try DIFFERENT COMBINATIONS of operations and not just limit to the combinations shown in those examples. The more challenging questions you create, the better it is.

Example input: Passage: The outbreak of the Seven Years' War in Europe in 1756 resulted in renewed conflict between French and British forces in India. The Third Carnatic War spread beyond southern India and into Bengal where British forces captured the French settlement of Chandernagore in 1757. However, the war was decided in the south, where the British successfully defended Madras, and Sir Eyre Coote decisively defeated the French, commanded by Comte de Lally at the Battle of Wandiwash in 1760. After Wandiwash, the French capital of Pondicherry fell to the British in 1761. The war concluded with the signing of the Treaty of Paris in 1763, which returned Chandernagore and Pondichery to France, and allowed the French to have "factories" in India but forbade French traders from administering them. The French agreed to support British client governments, thus ending French ambitions of an Indian empire and making the British the dominant foreign power in India.
Example output: Which french settlement did the British capture first, Chandernagore or Pondicherry?
Example explanation: This is a good question since it involves a comparison around a particular event, "British capturing the French settlement", which requires looking at more than a single sentence.
Q: Passage: In 1918, party membership was approximately 200,000. In the late 1920s under Stalin, the party engaged in an intensive recruitment campaign, the "Lenin Levy", resulting in new members referred to as the Lenin Enrolment, from both the working class and rural areas. This represented an attempt to "proletarianize" the party and an attempt by Stalin to strengthen his base by outnumbering the Old Bolsheviks and reducing their influence in the Party. In 1925, the party had 1,025,000 members in a Soviet population of 147 million. In 1927, membership had risen to 1,200,000. During the collectivization campaign and industrialization campaigns of the first five-year plan from 1929 to 1933, party membership grew rapidly to approximately 3.5 million members. However, party leaders suspected that the mass intake of new members had allowed "social-alien elements" to penetrate the partys ranks and document verifications of membership ensued in 1933 and 1935, removing supposedly unreliable members. Meanwhile, the party closed its ranks to new members from 1933 to November 1936. Even after the reopening of party recruiting, membership fell to 1.9 million by 1939. Nicholas DeWitt gives 2.307 million members in 1939, including candidate members, compared with 1.535 million in 1929 and 6.3 million in 1947. In 1986, the CPSU had over 19 million membersapproximately 10% of the Soviet Unions adult population. Over 44% of party members were classified as industrial workers and 12% as collective farmers. The CPSU had party organizations in 14 of the Soviet Unions 15 republics. The Russian Soviet Federative Socialist Republic itself had no separate Communist Party until 1990 because the CPSU controlled affairs there directly.
A:
How many members did the party lose 1933 to 1939?