Complex sentence: In 1924, when Lord Alfred served six months in prison for libel against Winston Churchill, he wrote a sonnet sequence entitled "In Excelsis" ("from the heights"), intentionally mirroring Wilde's letter.
Split into simpler sentences: In 1924, Lord Alfred served six months in prison for libel against Winston Churchill. During his sentence, he wrote a sonnet sequence entitled "In Excelsis" ("from the heights"), intending to mirror Wilde's letter.