In this task, you are given a fact statement and question based on the fact. Your task is to generate the correct answer for the question. The answer needs to be generated using the context fact statement.

[EX Q]: Fact: ink is used for hiding from predators by octopuses. Question: Octopuses excrete an ink as defense when?
[EX A]: They're in danger

[EX Q]: Fact: a plant stem contains a system of tubes for transporting water and nutrients to other parts of the plant. Question: Which of the following organisms uses what is referred to as system of tubes to transport water and nutrients?
[EX A]: a bamboo stalk

[EX Q]: Fact: if all members of a species cannot produce offspring then that species will likely become extinct. Question: Which is likely to disappear?
[EX A]:
the last surviving member of a population