Complex sentence: Noel Estrada (June 4,1918--1979) was the composer of "En mi Viejo San Juan", one of the most famous Boleros in Puerto Rico.
Split into simpler sentences: Noel Estrada (June 4,1918--1979) was a Puerto Rican composer. He was the author of "En mi Viejo San Juan", one of the most famous Boleros in Puerto Rico.