Complex sentence: This identification has been particularly used by the Francophone people of Quebec to refer to themselves as Québécois from the 1960s onward; prior to this, the Francophone people of Quebec identified themselves as French Canadians.
Split into simpler sentences: This identification has been particularly used by the Francophone people of Quebec to refer to themselves. Self-identification as Québécois became dominant in the 1960s; prior to this, the Francophone people of Quebec identified themselves as French Canadians.