Complex sentence: Born to a poor Jewish family in London that emigrated to Winnipeg, Canada, she became a dedicated socialist, active in the Industrial Workers of the World and a leader of the 1919 Winnipeg General Strike.
Split into simpler sentences: Born to a poor Jewish family in London that emigrated to Winnipeg, Canada. She became a dedicated socialist and became active in the Industrial Workers of the World and a leader of the 1919 Winnipeg General Strike.