Complex sentence: Metallica played here on the 26th of March 2009 as part of their World Magnetic Tour for their first time in Glasgow since the Scottish Download Festival which was held in the Glasgow Green on the 2nd of June 2004.
Split into simpler sentences: Metallica played here on 26 March 2009, as part of their World Magnetic Tour. This was their first performance in Glasgow since the Scottish Download Festival, which was held in the Glasgow Green on 2 June 2004.