Complex sentence: Lysiane Gagnon is a Canadian journalist based in Quebec who has written for Montreal's "La Presse" since 1980 and Toronto's "Globe and Mail" since 1990.
Split into simpler sentences: Lysiane Gagnon is a Canadian journalist based in the province of Quebec. She has written for Montreal's "La Presse" since 1980 and Toronto's "Globe and Mail" since 1990.