Complex sentence: The order was founded by Margaret Slachta, who was a pioneer in social service, and a leading political figure, who trained other women for political action and in 1920 became the first woman elected to the Hungarian Parliament.
Split into simpler sentences: The order was founded by Margaret Slachta, who was a pioneer in social service. She was also a leading political figure, who trained other women for political action and in 1920 became the first woman elected to the Hungarian parliament.