Complex sentence: Adolf Overweg (July 24,1822--September 27,1852) was a Hamburg born German geologist, astronomer, and traveler, although, at the time it was part of the Kingdom of Prussia.
Split into simpler sentences: Adolf Overweg (July 24,1822--September 27,1852) was a geologist, astronomer, and traveler. He was born in was a Hamburg, Germany, which at the time was part of the Kingdom of Prussia.