Complex sentence: Writer of the miscellany is a Dubrovnik nobleman Nikša Ranjina, who started copying down poems in his childhood; he started writing them in 1507 as a thirteen year old boy; it is not known when he finished the piece.
Split into simpler sentences: Writer of the miscellany is a Dubrovnik nobleman Nikša Ranjina, who started copying down poems in his childhood. He started writing them in 1507 as a thirteen year old boy, and it is not known when he finished the piece.