Complex sentence: In the spring of 1914 he moved to Oxford to study maritime law, but the outbreak of World War I forced him to return to Finland, where in 1916 he married Gerda Paula Serlachius (1886--1984).
Split into simpler sentences: In the spring of 1914 he moved to Oxford to study maritime law, but the outbreak of World War I forced him to return to Finland. In 1916 he married Gerda Paula Serlachius (1886--1984).