Complex sentence: Ginevra is to be married to the Duke of Ferrara, but during the ceremony (Act II) a poisoned veil she has been given causes her to faint away in a death-like trance; the sculptor Guido mourns her.
Split into simpler sentences: Ginevra is to be married to the Duke of Ferrara. During the ceremony, a poisoned veil she has been given causes her to faint away in a death-like trance; the sculptor Guido mourns her.