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.

Input: Consider Input: Question: Approximately how many weeks does the fetal period last? Answer: 30 weeks

Output: The fetal period lasts approximately 30 weeks weeks.


Input: Consider Input: Question: What proteins span the entire plasma membrane? Answer: transmembrane

Output: Transmembrane proteins span the entire plasma membrane.


Input: Consider Input: Question: How do scientists know that some mountains were once at the bottom of an ocean? Answer: Marine fossils have been found on the peaks of some mountains.


Output: Scientists know that some mountains were once at the bottom of an ocean because marine fossils have been found on the peaks of some mountains.