Complex sentence: In 1933 Stéphanie married Count Pierre d'Alcantara de Querrieu (1907--1944), and in 1945 she married Karl-Axel Björklund (1906--1986).
Split into simpler sentences: In 1933 Stéphanie married Count Pierre d'Alcantara de Querrieu. After the death of her husband, she remarried in 1945 Karl-Axel Björklund (1906--1986).