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.
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Question: Passage: The Japanese attempted to deny the Russians use of Port Arthur. During the night of 13-14 February, the Japanese attempted to block the entrance to Port Arthur by sinking several concrete-filled steamers in the deep water channel to the port, but they sank too deep to be effective. A similar attempt to block the harbour entrance during the night of 3-4 May also failed. In March, the charismatic Vice Admiral Makarov had taken command of the First Russian Pacific Squadron with the intention of breaking out of the Port Arthur blockade. On 12 April 1904, two Russian pre-dreadnought battleships, the flagship Petropavlovsk and the Pobeda, slipped out of port but struck Japanese mines off Port Arthur. The Petropavlovsk sank almost immediately, while the Pobeda had to be towed back to port for extensive repairs. Admiral Makarov, the single most effective Russian naval strategist of the war, perished on the battleship Petropavlovsk. On 15 April 1904, the Russian government made overtures threatening to seize the British war correspondents who were taking the ship Haimun into warzones to report for the London-based Times newspaper, citing concerns about the possibility of the British giving away Russian positions to the Japanese fleet. The Russians quickly learned, and soon employed, the Japanese tactic of offensive minelaying. On 15 May 1904, two Japanese battleships, the Yashima and the Hatsuse, were lured into a recently laid Russian minefield off Port Arthur, each striking at least two mines. The Hatsuse sank within minutes, taking 450 sailors with her, while the Yashima sank while under tow towards Korea for repairs. On 23 June 1904, a breakout attempt by the Russian squadron, now under the command of Admiral Wilgelm Vitgeft, failed. By the end of the month, Japanese artillery were firing shells into the harbour.

Answer: How many days passed between the two Russian pre-dreadnaught battleships struck mines and the two Japanese battleships triking mines?


Question: Passage: The second game of 2015 against the Packers was held on Thanksgiving Day in Green Bay. The two teams, in their 190th meeting, had never played each other on the holiday; in Thanksgiving games, the Bears were 16-15-2, while the Packers were 14-19-2. Chicago's offense took on a defense that ranked second in the league in first quarter points allowed with 1.9, along with a defense that recorded six sacks in week eleven against Minnesota. Jeff Joniak added that the offense had to improve its red zone performance; against Denver, the Bears failed to score on three of the four trips to the red zone, leading to a 41.2 percent touchdown efficiency in 2015; in ten games, the Bears were only able to score 14 touchdowns within the 20-yard line. On the other side, Joniak stated the defense had to stop the Packers offense early; since 2014, the Packers had outscored opponents 151-27 at Lambeau, while also leading the league in first quarter points with an average of 7.6. Aaron Rodgers had thrown eight first quarter touchdown passes (the most in the NFL) in 2015, while the Packers had a league-best +57 scoring differential. Meanwhile, the Bears defense had allowed nine touchdowns in the first, though the defense had not given up a touchdown in the third quarter. Joniak also wrote that the Bears had to "match and surpass the emotion" on a night that featured Brett Favre's jersey retirement "with their most physical, error-free and consistent performance". Eddie Royal, Ka'Deem Carey, Martellus Bennett, Antrel Rolle, cornerback Jacoby Glenn, Nick Becton and Will Sutton were inactive. The Bears won the toss and deferred. The first four drives of the game ended without scores, as the Packers turned the ball over on downs during their first drive and the ensuing series were punts. On the next drive, Tracy Porter intercepted Rodgers, but was penalized for illegal contact, and the play was nullified. Afterwards, Rodgers threw a 25-yard touchdown pass to Lacy. The Bears' woes continued with the following kickoff, when Marc Mariani and Deonte Thompson collided while attempting to catch the kick and the latter had to kneel in the endzone for the touchback. The next four possessions led to punts; on Green Bay's next drive, Lacy recorded a 15-yard run, but was hit from behind by Chris Prosinski and fumbled, with the ball being recovered by Lamarr Houston. Chicago took advantage of the takeaway when Jay Cutler threw a three-yard touchdown pass to Zach Miller. However, on the next kickoff, nickelback Bryce Callahan missed a tackle and allowed Jeff Janis to record a 64-yard return; the Packers eventually converted it into a 22-yard field goal. Assisted by a 37-yard kickoff return by Thompson, the Bears offense scored with Cutler's 20-yard touchdown pass to Marquess Wilson, but the play was overturned after he was downed at the one. Afterwards, Jeremy Langford's one-yard run gave the Bears the 14-10 lead. Mason Crosby kicked a 50-yard field goal to end the half. The third quarter featured no scores, though the Bears' last drive of the quarter (which lasted into the final quarter) ended with Robbie Gould's 21-yard field goal to extend the lead by four points. After two further punts, Rodgers' slant pass for Davante Adams was intercepted by Porter. However, the Bears were unable to capitalize, and punted. With 2:23 left in the game, the Packers drove from their own 20-yard line to the Bears' eight. Rodgers' passes to James Jones, Richard Rodgers and Adams all fell incomplete, and Cutler kneeled once to seal the win. With the win, the Bears won their third consecutive away game for the first time since 2012. Over the last four games, the Bears allowed less than 20 points in each, also last accomplished in 2012. The game averaged 27.8 million viewers, the most-watched Thanksgiving primetime game in NFL history and the second-highest viewed regular season game for NBC.

Answer: How many more games had the Bears won than they had lost in Thanksgiving games?


Question: Passage: The following year, the feud between the nobility and plundering by robber knights continued. In 1385, the castle of Ricklingen, where the Mandelslohs resided, was besieged. When a catapult threw a heavy rock at the troops of Duke Albert, he was hit, and died on 28 June 1385. In the wake of his death, Elector Wenceslas appointed Bernard, his brother-in-law, as co-regent involved him in the government. But his younger brother Henry did not agree with this ruling, and after vain attempts to reach an agreement, the fight flared up again in the spring of 1388. Elector Wenceslas had to assemble an army without the help of Bernard, supported by the town of Lüneburg. From Winsen an der Aller, he wanted to attack Celle, which was held by Henry and his mother. During the preparations, however, Elector Wenceslas fell seriously ill and died shortly thereafter. According to legend, he was poisoned. Lüneburg continued the preparations, formed an alliance with the Bishop of Minden and Count of Schaumburg and set up his own army. On 28 May 1388, battle was joined at Winsen an der Aller; it ended in victory for Henry. According to the provisions of the Treaty of Hanover from the year 1373, after the death of Wensceslas, the Principality passed to the House of Welf. In 1389, a inheritance agreement between the Welfs and the Ascanians was concluded, the treaty of 1374 was abolished, and the Principality was finally secured for the Welfs.

Answer:
How did the Welfs inherit the Principality?