Complex sentence: Judith Winsor Smith (nèe McLauthlin) (1821-1921) was an American abolitionist and women's suffrage activist, she was involved in the suffrage movement until the Nineteenth Amendment was passed in 1920.
Split into simpler sentences: Judith Winsor Smith (nèe McLauthlin) (1821-1921) was an American abolitionist and women's suffrage activist. She was involved in the suffrage movement until the Nineteenth Amendment was passed in 1920.