Simplify the following text for a Grade 9 native English-speaking person.
Original: Bowie toured and gave press conferences as Ziggy before a dramatic and abrupt on-stage `` retirement '' at London 's Hammersmith Odeon on 3 July 1973 .
Simplified: Bowie let Ziggy Stardust come to an end during a liveconcert in the Hammersmith Odeon theater ( London ) on July 3 , 1973 .