Complex sentence: On the first and second day of the trial, witnesses testified to hearing sounds of arguing that lasted about an hour followed by what were described as a woman's screams and gunshots on the night Steenkamp died.
Split into simpler sentences: On the first and second day of the trial, a witness testified to hearing sounds of arguing that lasted about an hour. Several witnesses testified to what were described as a woman's screams and gunshots on the night Steenkamp died.