This task is about writing a correct answer for the reading comprehension task. Based on the information provided in a given passage, you should identify the shortest continuous text span from the passage that serves as an answer to the given question. Avoid answers that are incorrect or provides incomplete justification for the question.

Passage: The Space Age is a period encompassing the activities related to the Space Race, space exploration, space technology, and the cultural developments influenced by these events. The Space Age began with the development of several technologies that culminated with the launch of Sputnik 1 by the Soviet Union. This was the world's first artificial satellite, orbiting the Earth in 98.1 minutes and weighing in at 83 kg. The launch of Sputnik 1 ushered a new era of political, scientific and technological achievements that became known as the Space Age. The Space Age was characterized by rapid development of new technology in a close race mostly between the United States and the Soviet Union. The Space Age brought the first human spaceflight during the Vostok programme and reached its peak with the Apollo program which captured the imagination of much of the world's population. The landing of Apollo 11 was an event watched by over 500 million people around the world and is widely recognized as one of the defining moments of the 20th century. Since then and with the end of the space race due to the dissolution of the Soviet Union, public attention has largely moved to other areas. Question: What did Sputnik 1 usher in?
The Space Age

Passage: Chopin made his last public appearance on a concert platform at London's Guildhall on 16 November 1848, when, in a final patriotic gesture, he played for the benefit of Polish refugees. By this time he was very seriously ill, weighing under 99 pounds (i.e. less than 45 kg), and his doctors were aware that his sickness was at a terminal stage. Question: Who were the beneficiaries of his last public concert?
Polish refugees.

Passage: Uruguay's 1830s were dominated by the confrontation between Manuel Oribe and Fructuoso Rivera, the two revolutionary leaders who had fought against the Empire of Brazil under the command of Lavalleja, each of whom had become the caudillo of their respective faction. Politics were divided between Oribe's Blancos ("whites"), represented by the National Party, and Rivera's Colorados ("reds"), represented by the Colorado Party, with each party's name taken from the colour of its emblems. In 1838, Oribe was forced to resign the presidency; he established a rebel army and began a long civil war, the Guerra Grande, which lasted until 1851. Question: Manuel Oribe and Fructuoso Rivera fought under whose command?

Lavalleja