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

Input: Consider Input: Mucous does the esophagus produce for lubrication.

Output: What does the esophagus produce for lubrication?


Input: Consider Input: Phosphate groups are found within phospholipids and nucleotides.

Output: Phosphate groups are found within phospholipids and what else?


Input: Consider Input: Transparent matter transmits light without scattering it.


Output: What type of matter transmits light without scattering it?