Complex sentence: These settlers, who became known as the Pennsylvania Dutch, were by 1730 widely cultivating saffron after corms were first brought to America in a trunk owned by German adherents of a Protestant sect known as the Schwenkfelder Church.
Split into simpler sentences: These settlers, who became known as the Pennsylvania Dutch, were by 1730 widely cultivating saffron after corms were first brought to America--in a trunk. It was owned by German adherents of a Protestant sect known as the Schwenkfelder Church.