Complex sentence: The family of storms, known as the Glazier-Higgins-Woodward tornadoes, ranked as the sixth deadliest in US history, having caused many fatalities and much damage in other communities in Texas, Oklahoma, and Kansas.
Split into simpler sentences: The family of storms, known as the Glazier-Higgins-Woodward tornadoes, ranked as the sixth deadliest in US history. They caused many fatalities and much damage in other communities in Texas, Oklahoma, and Kansas.