Complex sentence: Hirst and his collaborators consciously imitated the look of Charles Saatchi's first gallery in St John's Wood that had opened a few years earlier and Saatchi was an early visitor to the show where he was first introduced to Damien Hirst.
Split into simpler sentences: Hirst and his collaborators consciously imitated the look of Charles Saatchi's first gallery in St John's Wood that had opened a few years earlier. Indeed Saatchi was an early visitor to the show where he was first introduced to Damien Hirst.