Complex sentence: In Canada, some of Tetragrammaton's releases were manufactured and distributed by the Canadian division of Polydor Records which also issued several Canada-only Deep Purple compilations after Tetragrammaton's demise.
Split into simpler sentences: In Canada, some of Tetragrammaton's releases were released by the Canadian division of Polydor Records. Polydor of Canada also released a couple of unique Deep Purple compilations after Tetragrammaton's demise.