Complex sentence: The stabbings began at 8:15 p.m. and took place in different locations inside the mall, leaving nine people injured, three of whom were hospitalized with non-life-threatening wounds.
Split into simpler sentences: The stabbings began at 8:15 p.m. and took place in different locations inside the mall. They left nine people injured, three of whom were hospitalized with non-life-threatening wounds.