Complex sentence: Historians have christened her "Lemonade Lucy" due to her staunch support of the temperance movement; however, contrary to popular belief, she was never referred to by that nickname while living, and it was her husband who banned alcohol from the White House.
Split into simpler sentences: Historians have christened her "Lemonade Lucy" due to her staunch support of the temperance movement. However, contrary to popular belief, she was never referred to by that nickname while living, and it was her husband who banned alcohol from the White House.