Martin McGuinness — Irish Politician born on May 23, 1950,

James Martin Pacelli McGuinness is an Irish republican Sinn Féin politician who has been the deputy First Minister of Northern Ireland since 2007. He was also Sinn Féin's unsuccessful candidate for President of Ireland in the 2011 election... (wikipedia)

The most important thing to say is that Sinn Fein isn't going back to anything. We are a party on the move.
Our ability to make a decision about the declaration is hampered by the British government being reluctant to give us the clarification which we require.
Let us walk into the conference room as equals and not second class citizens.
But the fact is that the vast majority of Republicans support the Sinn Fein leadership.
The British government says that for Sinn Fein to be involved in talks the guns must be left at the door.