In this task you will be given an answer to a question. You need to generate a question. The answer given should be a correct answer for the generated question.

[Q]: A roller coaster is a type of amusement ride that employs a form of elevated railroad track designed with tight turns, steep slopes, and sometimes inversions. People ride along the track in open cars, and the rides are often found in amusement parks and theme parks around the world. LaMarcus Adna Thompson obtained one of the first known patents for a roller coaster design in 1885, related to the Switchback Railway that opened a year earlier at Coney Island. The track in a coaster design does not necessarily have to be a complete circuit, as shuttle roller coasters demonstrate. Most roller coasters have multiple cars in which passengers sit and are restrained. Two or more cars hooked together are called a train. Some roller coasters, notably wild mouse roller coasters, run with single cars.
[A]: when was the first ever roller coaster built


[Q]: The political position of Prime Minister of Brazil existed in two different parliamentary periods in the country's history: from 1847 to 1889 (during most of the Empire) and from 1961 to 1963 (during the last years of the Second Republic).
[A]: who is the current prime minister of brazil


[Q]: Canada was hit hard by the Great Depression. The worldwide depression that started in the United States in late 1929 quickly reached Canada. Between 1929 and 1939, the gross domestic product dropped 40% (compared to 37% in the US). Estimates show that unemployment reached up to 27% at the depth of the Depression in 1933. Many companies closed, as corporate profits of $398 million in 1929 turned into losses of $98 million as prices fell. Farmers in the Prairies were hit especially hard by the collapse of wheat prices. Despite the emergence of numerous radical parties, the government was run by the major parties. The Depression ended in 1939 as World War II began.
[A]:
when did the great depression start and end in canada