Task: Text Simplification
Input (English): Max Lu ̈ scher ( September 9 , 1923 – February 2 , 2017 ) was a Swiss psychotherapist known for inventing the Lu ̈ scher color test , a tool for measuring an individual 's psychophysical state based on his or her color preferences .
Output (English): Max Lu ̈ scher ( September 9 , 1923 – February 2 , 2017 ) was a Swiss psychotherapist .