Instructions: 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: Question: The "knee-jerk" motion that people involuntarily perform after being struck in the knee in a certain way is an example of what kind of behavior? Answer: reflex
Output:
The "knee-jerk" motion that people involuntarily perform after being struck in the knee in a certain way is an example of a reflex