Complex sentence: Drmić totalled only one goal from 19 games across all competitions before leaving on loan; on 28 November he headed as they came from behind to draw 3--3 at TSG 1899 Hoffenheim.
Split into simpler sentences: Drmić totalled only one goal from 19 matches across all competitions before leaving on loan. His only goal came on 28 November, a header as Mönchengladbach came from behind to draw 3--3 at 1899 Hoffenheim.