Complex sentence: His father, Hans Borchsenius, was a Danish-born newspaperman and politician; his mother, Martha M. Bakke, was born in Norway, a daughter of Hans E. Bakke, of Copenhagen.
Split into simpler sentences: His father, Hans Borchsenius, was a Danish-born newspaperman and politician. His mother, Martha M. Bakke, was born in Norway, a daughter of Hans E. Bakke, of Copenhagen.