Complex sentence: In 1618 he opened schools at Augsburg and elsewhere, but at Köthen difficulties with the clergy led to his imprisonment for eight months, and after starting another school at Magdeburg in 1620 which failed, he became a wanderer and died at Erfurt in 1635.
Split into simpler sentences: In 1618 he opened schools at Augsburg and elsewhere; however, at Köthen difficulties with the clergy led to his imprisonment for eight months. After starting another school at Magdeburg in 1620, which failed, he became a wanderer and died at Erfurt in 1635.