Instructions: In this task, you are given a sentence and a question, you would be asked to create the answer which is contained in the sentence provided.
Input: Sentence: The “knee-jerk" motion that people involuntarily perform after being struck in the knee in a certain way is an example of a reflex 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?
Output:
reflex