Complex sentence: Founded upon the teachings of Ann Lee, Shakers today are mostly known for their cultural contributions (especially their style of music and furniture), and their model of equality of the sexes, which they institutionalized in their society in the 1780s.
Split into simpler sentences: Founded upon the teachings of Ann Lee, Shakers today are mostly known for their cultural contributions (especially style of music and furniture). However, the Shakers' enduring legacy includes their model of equality of the sexes, which they institutionalized in their society in the 1780s.