Complex sentence: Saskia van Uylenburgh (August 2,1612, Leeuwarden, Friesland--June 14,1642) was the daughter of a Frisian mayor and became the wife of the Dutch painter Rembrandt van Rijn, the son of a wealthy miller from Leiden.
Split into simpler sentences: Saskia van Uylenburgh (August 2,1612, Leeuwarden, Friesland--June 14,1642) was the daughter of a Frisian mayor. She became the wife of Rembrandt van Rijn, a Dutch painter and the son of a wealthy miller from Leiden.