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text: `In addition, a study was made of the planet's surface, which is covered by an ocean dotted with innumerable flat, low-lying islands whose combined area is less than that of Europe, although the diameter of Solaris is a fifth greater than Earth's. These expanses of barren, rocky territory, irregularly distributed, are largely concentrated in the southern hemisphere.`,
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question: "What is the planet's surface like?",
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answers: [
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'It has many low-lying islands.',
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'It has an island the size of Europe.',
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'It is a rocky area of around 600 square miles.',
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'It is mostly desert-like.'
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],
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correctAnswer: 'It has many low-lying islands.'
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},
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{
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id: 2,
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text: `The discovery of Solaris dated from about 100 years before I was born. The planet orbits two suns: a red sun and a blue sun. For 45 years after its discovery, no spacecraft had visited Solaris. At that time, the Gamow-Shapley theory — that life was impossible on planets which are satellites of two solar bodies — was firmly believed. The orbit is constantly being modified by variations in the gravitational pull in the course of its revolutions around the two suns.`,
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question: "How many suns does Solaris orbit around?",
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