Complex sentence: In 1891, Cormontan, her father, and her sister Eivinda all moved to Franklin, MN to live with the oldest brother, C. G. V., who had trained as a pharmacist in Norway and opened a drug store with his brother Edvard.
Split into simpler sentences: In 1891, Cormontan, her father, and her sister Eivinda all moved to Franklin, MN. Cormontan's older brother, C. G. V., was trained as a pharmacist and opened the Franklin Drug Store with his brother Edvard.