Task: Story Composition
Input (English): Premise: Mason had been diagnosed with leukemia. 
 Initial Context: He was really afraid that he might die soon. 
 Original Ending: His doctor suggested a risky new drug trial. Mason decided it couldn't hurt and signed up. To his delight the drugs worked and he felt healthier soon. 
 New ending: His doctor suggested a risky new preventative drug trial. Mason decided it couldn't hurt and signed up. To his delight the drugs worked and he never got cancer. 
Output (English): He was so relieved when he found out it was a misdiagnosis.