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

Input: Consider Input: Sexually do invertebrates reproduce.

Output: How do invertebrates reproduce?


Input: Consider Input: The earth's magnetic poles have switched places repeatedly in the past.

Output: The earth's magnetic poles have done what repeatedly in the past?


Input: Consider Input: Just as salty taste involves perception of sodium ions in saliva, sweet taste correlates with presence of glucose.


Output: Just as salty taste involves perception of sodium ions in saliva, what taste correlates with presence of glucose?