Complex sentence: Abel Carlevaro (1916--2001) was, an exceptional virtuoso, classic guitar composer and teacher born in Montevideo, Uruguay, was not only one of the most important guitarists of our time but the creator of a new school of instrumental technique as well.
Split into simpler sentences: Abel Carlevaro (1916--2001) was an exceptional virtuoso, classic guitar composer and teacher born in Montevideo, Uruguay. He was not only one of the most important guitarists of our time but the creator of a new school of instrumental technique as well.