This task is about reading the given passage and construct a question about the information present in the passage. Construct a question in such a way that (i) it is unambiguous, (ii) it is answerable from the passage, (iii) its answer is unique (iv) its answer is a continuous text span from the paragraph. Avoid creating questions that (i) can be answered correctly without actually understanding the paragraph and (ii) uses same words or phrases given in the passage.

Q: In an effort to demonstrate peaceful intentions toward Germany, on 13 April 1941, the Soviets signed a neutrality pact with Axis power Japan. While Stalin had little faith in Japan's commitment to neutrality, he felt that the pact was important for its political symbolism, to reinforce a public affection for Germany. Stalin felt that there was a growing split in German circles about whether Germany should initiate a war with the Soviet Union. Stalin did not know that Hitler had been secretly discussing an invasion of the Soviet Union since summer 1940, and that Hitler had ordered his military in late 1940 to prepare for war in the east regardless of the parties' talks of a potential Soviet entry as a fourth Axis Power.

A: Who was planning an invasion of the Soviet Union?
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Q: LED lamps have been advocated as the newest and best environmental lighting method. According to the Energy Saving Trust, LED lamps use only 10% power compared to a standard incandescent bulb, where compact fluorescent lamps use 20% and energy saving halogen lamps 70%. The lifetime is also much longer — up to 50,000 hours. A downside is still the initial cost, which is higher than that of compact fluorescent lamps.

A: How much more power does a standard incandescent bulb use compared to LED?
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Q: Detroit has a Mexican-American population. In the early 20th century thousands of Mexicans came to Detroit to work in agricultural, automotive, and steel jobs. During the Mexican Repatriation of the 1930s many Mexicans in Detroit were willingly repatriated or forced to repatriate. By the 1940s the Mexican community began to settle what is now Mexicantown. The population significantly increased in the 1990s due to immigration from Jalisco. In 2010 Detroit had 48,679 Hispanics, including 36,452 Mexicans. The number of Hispanics was a 70% increase from the number in 1990.

A:
When did Mexicantown start to grow?
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