TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: Articular processes allow for the greatest range of rotation within the vertebral column and facilitate the movement of the head.

SOLUTION: What processes allow for the greatest range of rotation within the vertebral column and facilitate the movement of the head?

PROBLEM: Through a process called electromagnetic induction, generators change the kinetic energy of a spinning turbine to electrical energy.

SOLUTION: Through a process called electromagnetic induction, generators change what energy form of a spinning turbine to electrical energy?

PROBLEM: There are about 50,000 vertebrate species, and they are placed in nine different classes.

SOLUTION:
There are about 50,000 vertebrate species, and they are placed in how many different classes?