Complex sentence: The first performance of "Das klagende Lied" took place on 17 February 1901 in Vienna with Mahler himself conducting, and it was in this two-part version that the work was published and entered the repertoire.
Split into simpler sentences: The first performance of "Das klagende Lied" took place on 17 February 1901 in Vienna, with Mahler himself conducting. It was in this two-part version that the work was published and entered the repertoire.