Complex sentence: She also has a foundation to help Puerto Rico's under-privileged children, for which she organizes charity balls, which have been attended by such celebrities as Sarah Ferguson, and fashion designer Carolina Herrera.
Split into simpler sentences: She also has a foundation to help Puerto Rico's under privileged children, andshe organizes charity balls to help the organization. The charity balls have been attended recently by such celebrities as Sarah Ferguson, and fashion designer Carolina Herrera.