Question: Im Not Ashamed is a biographical drama film, based on what massacre involving two American spree killers Eric Harris and Dylan Klebold, who killed 13 people and wounded 24 others?
{'answer': '1999 Columbine High School massacre', 'supporting_facts': [["I'm Not Ashamed", 0], ["I'm Not Ashamed", 1], ['Eric Harris and Dylan Klebold', 0]]}