In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.

[EX Q]: Question: Amines are weak bases due to the presence of a lone pair of what on the nitrogen atom? Answer: electrons
[EX A]: Amines are weak bases due to the presence of a lone pair of electrons on the nitrogen atom.

[EX Q]: Question: What type of distance is caused by the force you apply to a machine over a given distance? Answer: input distance
[EX A]: Input distance type of distance is caused by the force you apply to a machine over a given distance.

[EX Q]: Question: What causes the changes of puberty? Answer: estrogen
[EX A]:
Estrogen causes the changes of puberty.