Complex sentence: Many of his poems were later adapted by Antonín Dvořák; by far the most well known and widely performed is tender Songs My Mother Taught Me with its equally hauntingly and exquisite setting.
Split into simpler sentences: Many of his poems were later adapted by Antonín Dvořák. By far the most well known and widely performed of which is the tender Songs My Mother Taught Me with its hauntingly exquisite setting.