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.

Question: The outer shell of our planet is made of? Answer: sedimentary formations.
Earth 's surface is made of rock

Question: Octopuses excrete an ink as defense when? Answer: They're in danger.
ink is used for hiding from predators by octopuses

Question: If someone wants you to stop, they want you to? Answer: be still.

stopped means no speed