Problem: Given the question: Extract the answer to the question from the following context. Question: What were people fighting against? Context: After a lengthy period of formal racial segregation in the former Confederacy following the Reconstruction Era, and bans on interracial marriage in various parts of the country, more people are openly forming interracial unions. In addition, social conditions have changed and many multiracial people do not believe it is socially advantageous to try to "pass" as white. Diverse immigration has brought more mixed-race people into the United States, such as the large population of Hispanics identifying as mestizos. Since the 1980s, the United States has had a growing multiracial identity movement (cf. Loving Day). Because more Americans have insisted on being allowed to acknowledge their mixed racial origins, the 2000 census for the first time allowed residents to check more than one ethno-racial identity and thereby identify as multiracial. In 2008 Barack Obama was elected as the first multiracial President of the United States; he acknowledges both sides of his family and identifies as African American.
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The answer is:
racial segregation

Problem: Given the question: Extract the answer to the question from the following context. Question: What people were on the ground fighting during the takeover? Context: The Russian Revolution is the series of revolutions in Russia in 1917, which destroyed the Tsarist autocracy and led to the creation of the Soviet Union. Following the abdication of Nicholas II of Russia, the Russian Provisional Government was established. In October 1917, a red faction revolution occurred in which the Red Guard, armed groups of workers and deserting soldiers directed by the Bolshevik Party, seized control of Saint Petersburg (then known as Petrograd) and began an immediate armed takeover of cities and villages throughout the former Russian Empire.
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The answer is:
armed groups of workers and deserting soldiers

Problem: Given the question: Extract the answer to the question from the following context. Question: What country has a successful system of bicycle sharing? Context: The local government continuously strives for a reduction of massive traffic congestion, and has increased incentives for making a bicycle-friendly city. This includes North America's second-largest bicycle sharing system, EcoBici, launched in 2010, in which registered residents can get bicycles for 45 minutes with a pre-paid subscription of 300 pesos a year. There are, as of September 2013, 276 stations with 4,000 bicycles across an area stretching from the Historic center to Polanco. within 300 metres (980 feet) of one another and are fully automatic using a transponder based card. Bicycle-service users have access to several permanent Ciclovias (dedicated bike paths/lanes/streets), including ones along Paseo de la Reforma and Avenida Chapultepec as well as one running 59 kilometres (37 miles) from Polanco to Fierro del Toro, which is located south of Cumbres del Ajusco National Park, near the Morelos state line. The city's initiative is inspired by forward thinking examples, such as Denmark's Copenhagenization.
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The answer is:
Denmark