Spanish wine the southern Mediterranean coast are suitable for producing grapes of high alcohol levels and low acidity. Spanish wine laws created the "Denominación de Origen" (DO) system in 1932 and were later revised in 1970. The system shares many similarities with the hierarchical "Appellation d'origine contrôlée" (AOC) system of France, Portugal's "Denominação de Origem Controlada" (DOC) and Italy's "Denominazione di origine controllata" (DOC) system. As of 2009, there were 79 Quality Wine areas across Spain. In addition there is "Denominación de Origen Calificada" (DOCa or DOQ in Catalan) status for DOs that have a consistent track record for quality. There are
What Shall We Do Now? song is the same backing track as "Empty Spaces", but in the original key of D minor. It's a slow, dark progression with a repetitive, electronic drum beat and solo guitar, but where "Empty Spaces" ends and segues into "Young Lust", "What Shall We Do Now?" moves into a second, louder section punctuated with guitar power chords. The transition of D - E - F - E is a recurring theme throughout the album, heard on "In the Flesh?", "In the Flesh", "Waiting for the Worms", and the three "Another Brick in the Wall" songs. The long verse is played