Complex sentence: From 1918 to 1921 she would star in twenty three films, and she became well known and recognizable as an actress, and in 1918 she had married producer Fred Niblo, who would later produce the second film version of "Ben Hur".
Split into simpler sentences: From 1918 to 1921 she starred in twenty three films, becoming well known and recognizable as an actress. In 1918 she married producer Fred Niblo, who later produced the second film version of "Ben Hur".