TASK DEFINITION: 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.
PROBLEM: Question: Approximately how many weeks does the fetal period last? Answer: 30 weeks

SOLUTION: The fetal period lasts approximately 30 weeks weeks.

PROBLEM: Question: If an ecosystem’s balance is disturbed by a volcanic eruption, what will most likely occur? Answer: The ecosystem will eventually become balanced again.

SOLUTION: If an ecosystem’s balance is disturbed by a volcanic eruption, the ecosystem will eventually become balanced again will most likely occur.

PROBLEM: Question: Which sphincter is located at the stomach end of the esophagus and opens to allow the bolus to enter the stomach? Answer: gastro-esophageal sphincter

SOLUTION:
Gastro-esophageal sphincter sphincter is located at the stomach end of the esophagus and opens to allow the bolus to enter the stomach.