Complex sentence: The standard of living of most of the population of Brighton Beach is low, as described by the 2010 census: the average income of households in the area was $36,574, while the average income in the whole city is $55,217.
Split into simpler sentences: The standard of living of most of the population of Brighton Beach is low, as described by the 2010 census. The average income of households in the area was $36,574; the average income in the whole city is $55,217.