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

Ex Input:
The second step in eukaryotic cell division is division of nucleus part of the cell.

Ex Output:
The second step in eukaryotic cell division is division of which part of the cell?


Ex Input:
Socket secures teeth in the mouth.

Ex Output:
What secures teeth in the mouth?


Ex Input:
Lithium has three electrons.

Ex Output:

How many electrons does lithium have?