Complex sentence: He was noted for his role in the Balcombe Street Siege in December 1975 and later for his appearance at the 1998 Provisional Sinn Féin Ard Fheis.
Split into simpler sentences: He was noted for his role in the Balcombe Street Siege in December 1975. He later made an appearance at the 1998 Provisional Sinn Féin Ard Fheis.