instruction:
Given a fact, create a question that can be answered using the fact. Construct the question such that it is unambiguous, has a unique answer and the answer can be given using the fact.
question:
Fact: amphibians undergo metamorphosis
answer:
When a frog is born, it has tiny gills so that it can breathe underwater, even though in adulthood it will?


question:
Fact: iron is always magnetic
answer:
A person wants to mine something that will attract metals. The person decides to search out some?


question:
Fact: the amount of daylight is greatest on the summer solstice
answer:

The best time to have an all-day BBQ in the northern hemisphere is?