Complex sentence: The Taifa of Mértola was a medieval taifa Moorish kingdom that existed in what is now southeastern Portugal for three distinct periods: from 1033 to 1044, from 1144 to 1145 and from 1146 to 1151.
Split into simpler sentences: The Taifa of Mértola was a medieval taifa Moorish kingdom that existed in what is now southeastern Portugal. It existed three distinct periods: from 1033 to 1044, from 1144 to 1145 and from 1146 to 1151.