Complex sentence: It is said that she took an oath of virginity to the goddess Artemis; when two centaurs, Rhoikos and Hylaios, tried to rape her, Atalanta killed them.
Split into simpler sentences: It is said that she took an oath of virginity to the goddess Artemis. When two centaurs Rhoikos and Hylaios tried to rape her, Atalanta killed them.