Complex sentence: Heady was one of only two women since 1865 to be executed by federal authorities, the other being Ethel Greenglass Rosenberg who was executed at Sing Sing Prison in New York State, oddly enough also in 1953.
Split into simpler sentences: Heady was one of only two women since 1865 to be executed by federal authorities. The other was Ethel Greenglass Rosenberg who was executed at Sing Sing Prison in New York State, oddly enough also in 1953.