Complex sentence: Moving to Europe in 1956, she was based there for the next twenty years and performed with the Dublin Grand Opera Company and the Carl Rosa Opera Company in roles such as the title role in "Carmen" and Dorabella in "Così fan tutte".
Split into simpler sentences: Moving to Europe in 1956, she was based there for the next twenty years. She began her European career performing with the Dublin Grand Opera Company and the Carl Rosa Opera Company in such roles as the title role in "Carmen" and Dorabella in "Così fan tutte".