Complex sentence: Out of the seven districts that make up the equatorial Atlantic island group of São Tomé and Príncipe, its population is relatively small at approximately 15,370, but it is second largest in terms of area covering approximately 230 square kilometers.
Split into simpler sentences: Out of the seven districts that make up the equatorial Atlantic island group of São Tomé and Príncipe, its population is relatively small at approximately 15,370. However, it is second largest in terms of area covering approximately 230 square kilometers.