Complex sentence: After sailing through the Northeast Passage, which did not go as planned and took six years between 1918 and 1924, she ended up in Nome, Alaska and in August 1925 and was sold on behalf of Amundsen's creditors in Seattle, Washington.
Split into simpler sentences: After sailing through the Northeast Passage, which did not go as planned and lasted for six years from 1918 till 1924. She ended up in Nome, Alaska and in August 1925 and was sold on behalf of Amundsen's creditors in Seattle, Washington.