Complex sentence: Although some commentators have tried to style them "First Lady of Canada" this title is not officially recognized, and is based more on the pervasive influence of American media than on any historical notions of a defined public role for the Prime Minister's spouse.
Split into simpler sentences: Although some commentators have tried to style prime minister's wives as "First Lady of Canada," this title is not officially recognized. Use of the term is likely based more on the pervasive influence of American media than on any historical notions of a defined public role for the Prime Minister's spouse.