Complex sentence: The conga is a Latin American carnival march that became popular in the United States in the 1930s and 1950s, and was originated by African slaves doing the dance while chained together, and has important associations with Afro-Cuban Santería religion.
Split into simpler sentences: The conga is a Latin American carnival march that became popular in the United States in the 1930s and 1950s. Some say was originated by African slaves doing the dance while chained together, and has important associations with Afro-Cuban Santería religion.