Definition: 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.
Input: Passage: Greenleaf expanded and upgraded the Conn plant, and converted distribution from mail-order to retail dealers. By 1917 the assembly-line work force had increased to 550 employees who were turning out about 2500 instruments a month using a new hydraulic expansion process which Greenleaf introduced to the plant. In 1917 Conn introduced the Pan American brand for its second-line instruments. Conn founded the subsidiary Pan American Band Instrument Company in 1919 and later that year moved production of second-line instruments to the old Angledile Scale factory. In 1930 the Pan American company was absorbed by Conn, but the Pan American brand for Conns second-line instruments remained in use until 1955. Conn founded the Continental Music retail subsidiary in 1923. At its height, the operation included a chain of over 30 music stores. During the 1920s Conn owned the Elkhart Band Instrument Company (192327), the Leedy Company (192755), a manufacturer of percussion, and 49.9% of the stock of the retailer Selmer Company (192327). Conn purchased the drum manufacturer Ludwig Drums, the instrument import/retail operation of the Carl Fischer Music company, and accordion manufacturer Soprani in 1929. From 1940 to 1950 they owned the Haddorff Piano Company, and from 1941 to 1942 the Straube Piano Company.
Output:
How many more years was the Haddorff Piano Company owned 1940-1950 than Straube Piano Company?