Complex sentence: It brought together some of the individual city ambulance services which existed across the area and in 1992, it became an NHS trust, providing 24-hour emergency and healthcare services to more than 2.1 million people across the region.
Split into simpler sentences: It brought together some of the individual city ambulance services which existed across the area. In 1992, it became an NHS trust, providing 24-hour emergency and healthcare services to more than 2.1 million people across the region.