Complex sentence: Lie was married twice--first in 1929 to Ragnhild Halvorsen (1905-91) a companion from the labour youth movement, then in 1952 to Minnie Docterman (1912-99), an American woman.
Split into simpler sentences: Lie was married twice--first in 1929 to Ragnhild Halvorsen (1905-91) a companion from the labour youth movement. Then in 1952 to Minnie Docterman (1912-99), an American woman.