Complex sentence: Until the mid to late 1990s, Pearson owned and directed all rights to "TAS" and the magazine was published by Pearson Publishing Inc., which also published a sister high-end video review magazine published quarterly called "The Perfect Vision".
Split into simpler sentences: Until the mid to late 1990s, Pearson owned and directed all rights to TAS. The magazine was published by Pearson Publishing Inc., which also published a sister high-end video review magazine published quarterly called "The Perfect Vision".