Complex sentence: In 1999, Oisín won the All Ireland Fiddle Champion at Fleadh Cheoil, and in 2000, graduated Trinity College, Dublin/RIAM (Royal Irish Academy of Music).
Split into simpler sentences: In 1999, Oisín won the All Ireland Fiddle Champion at Fleadh Cheoil. In 2000, Oisín graduated Trinity College, Dublin/RIAM (Royal Irish Academy of Music).