Complex sentence: Growing dissatisfied with her session singer role, she returned to the musical stage, working on a theatre workshop project and in 1994 she joined the cast of the award-winning musical "Once On This Island".
Split into simpler sentences: Growing dissatisfied with her session singer role, she returned to the musical stage with work in a theatre workshop project. In 1994 she joined the cast of the award-winning musical "Once On This Island".