Complex sentence: Summerlin South is considered to be one of the most prestigious neighborhoods in the Las Vegas Valley and includes The Ridges, a very affluent gated community of custom luxury homes in southwest Summerlin.
Split into simpler sentences: Summerlin South is considered to be one of the most prestigious neighborhoods in the Las Vegas Valley. The area includes The Ridges, a highly affluent gated community of luxury mansions in southwest Summerlin.