Complex sentence: Princess Alice was the last grandchild of Queen Victoria to pass away, doing so in January 1981, almost 115 years after the passing of Prince Sigismund of Prussia, the first grandchild of Queen Victoria to die.
Split into simpler sentences: Princess Alice was the last grandchild of Queen Victoria to pass away. She died in January 1981, almost 115 years after the passing of Prince Sigismund of Prussia, the first grandchild of Queen Victoria to die.