Complex sentence: For the first time, the event will be expanded to include an entry from Nunavut, which did not participate in the Brier, as well as separate entries from the Yukon and Northwest Territories, which have historically competed as a single entry.
Split into simpler sentences: For the first time, the event will be expanded to include an entry from Nunavut, which has previously not participated in the Brier. Another notable change is having separate entries for the Yukon and Northwest Territories, which have historically competed as a single entry.