sentences:  Born in Brussels, her father Paul Janson was leading member of the progressive wing of the Belgian liberal movement and founder of the Fédération progressiste.Her brother Paul-Émile Janson served as Prime Minister of Belgium.Marie's mother, Anna-Augustine Amoré was a well-educated woman of middle-origins who had worked as teacher at Isabelle Gatti de Gamond's school before her marriage; Marie herself was educated there.