Complex sentence: Johann Michael Bretschneider (1680-1729) was a German painter, born at Aussig, in Bohemia, worked at Prague in the early part of the eighteenth century.
Split into simpler sentences: Johann Michael Bretschneider (1680-1729) was a German painter. Bretschneider was born at Aussig, in Bohemia, and worked at Prague in the early part of the eighteenth century.