Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

[Q]: The seven unique crystal types are defined by faces parts of themselves (parts that intersect at various angles).
[A]: The seven unique crystal types are defined by what parts of themselves (parts that intersect at various angles)?

[Q]: During the first year after birth, a baby called a(n) infant.
[A]: During the first year after birth, what is a baby called?

[Q]: The liver has three main components: hepatocytes, bile canaliculi, and this?
[A]:
The liver has three main components: hepatocytes, bile canaliculi, and this?