Task: Question Answering
Input (English): I was informed that Pickle naps every single day at rest time which blew me away because he quit napping at home a good 7 months ago . His teacher , magic . My mom is having surgery on the 30th for a torn rotator cuff . I have been popping over there now and again to see if she needs anything . 
Question: What's a possible reason the writer's Mom has a torn rotator cuff ?
Output (English): Because she injured herself doing a physical activity .