Complex sentence: Initially part of São Bernardo do Campo, Diadema became a city of its own in 1959 and has an area of 30.65 square kilometres (11.83 sq mi) and a population of 386,039, the 14th most populated in the state.
Split into simpler sentences: Initially part of São Bernardo do Campo, Diadema became a city of its own in 1959. The city has an area of 30.65 square kilometres (11.83 sq mi) and a population of 386,039, the 14th largest in the state.