Complex sentence: She was first engaged professionally with Banja Luka's National Theatre in 1969, however, she was soon hired by a small Sarajevo theatre presently known as a Kamerni Teatar 55.
Split into simpler sentences: She was first engaged professionally by Banja Luka's National Theatre in 1969. Shortly thereafter, she was hired by a small Sarajevo theatre presently known as Kamerni Teatar 55.