Complex sentence: Dorchester County, Maryland is the birthplace of the World-Famous Harriet Tubman across the Choptank River is also the birthplace of the World-Famous Frederick Douglass in Talbot County.
Split into simpler sentences: Dorchester County, Maryland is the birthplace of Harriet Tubman. Across the Choptank River is also the birthplace of Frederick Douglass in Talbot County.