Complex sentence: The island borrows a postal code V7W 1V7 from the wealthiest community in Canada, West Vancouver, however, Passage Island is actually overseen by the Islands Trust and is part of the Greater Vancouver Regional District.
Split into simpler sentences: The island borrows a postal code, V7W 1V7, from the wealthiest community in Canada, West Vancouver. However, Passage Island is actually overseen by the Islands Trust and is part of the Greater Vancouver Regional District.