Complex sentence: The Peterloo Massacre inevitably polarised opinions in the press, the radical outlets framing the incident in terms of murder and massacre, while the establishment outlets tended more to a defence of the yeomanry.
Split into simpler sentences: The Peterloo Massacre inevitably polarised opinions in the press. The radical outlets framed the incident in terms of murder and massacre, while the establishment outlets tended more to a defence of the yeomanry.