Complex sentence: The theatre was converted from the basement of the 135th street Harlem Library and was focused on creating, nurturing, developing, and promoting new writers, directors, performers, and actors within the black community.
Split into simpler sentences: The theatre was converted from the basement of the 135th street Harlem Library. The goal of the company was focusing on creating, nurturing, developing, and promoting new writers, directors, performers, and actors within the black community.