In this task, you are given a question and a corresponding answer. Your task is to generate a fact statement that is useful in answering the given question.

Q: Question: A telescope is required for detailed observation of what? Answer: astral bodies.

A: detailed observation of celestial objects requires a telescope
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Q: Question: Octopuses excrete an ink as defense when? Answer: They're in danger.

A: ink is used for hiding from predators by octopuses
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Q: Question: Naomi looks around outside on a prairie and it is cloudless but the sun is nowhere to be seen. It is? Answer: night.

A:
if it is night then the sun has set
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