Complex sentence: The rally was also addressed by the NUS president Aaron Porter, and the Trades Union Congress deputy general secretary, Frances O'Grady, the latter who offered the message to the government: Don't you dare tell us we're all in this together.
Split into simpler sentences: The rally was also addressed by NUS president Aaron Porter and the Trades Union Congress deputy general secretary Frances O'Grady. O'Grady offered the message to the government that: Don't you dare tell us we're all in this together.