Complex sentence: In former times enslaved African-American addressed their oppressors as master as a term reflective of their forced and unpaid labor, and they often pronounced it in a colloquial dialect as "massa".
Split into simpler sentences: In former times enslaved African-American addressed their oppressors as master as a term reflective of their forced and unpaid labor. Some of the enslaved Africans would often pronounce it in a colloquial dialect as "massa".