Complex sentence: While attending the university Giulietta Masina turned to acting, particularly after 1941, participating in numerous plays that included singing, and dancing as well as acting, all in the "Ateneo Theater" of her university.
Split into simpler sentences: While attending the university, Masina turned to acting, particularly after 1941. She participated in numerous plays that included singing and dancing as well as acting, all in the "Ateneo Theater" of her university.