Complex sentence: Citing a source close to the band, Gigwise.com reported that by the day of its online release, the album had sold 1.2 million copies; however, this was dismissed by Radiohead manager Bryce Edge as "exaggerated".
Split into simpler sentences: Citing a source close to the band, Gigwise.com reported that by the day of its online release, the album had sold 1.2 million copies. The claim, however, was dismissed by Radiohead manager Bryce Edge as "exaggerated".