Complex sentence: Glöggl was born on 21 February 1764 in Linz, which at that time was in the Archduchy of Austria, the son of the Austrian musician, composer and conductor Johann Joseph Glöggl.
Split into simpler sentences: Glöggl was born on 21 February 1764 in Linz, which at that time was in the Archduchy of Austria. He was the son of the Austrian musician, composer and conductor Johann Joseph Glöggl.