Complex sentence: Antonio de Trueba (24 December 1819--10 March 1889) was a Spanish poet, novelist, and folklorist born at Montellana, Biscay, in 1821 (some sources say 1819), where he was privately educated.
Split into simpler sentences: Antonio de Trueba (24 December 1819--10 March 1889) was a Spanish poet, novelist, and folklorist. He was born at Montellana, Biscay, in 1821 (some sources say 1819), where he was privately educated.