Complex sentence: By 1998, over 95% of his canola crop was of the Roundup Ready variety, however, at no point did Schmeiser use use any Roundup herbicide on his crops.
Split into simpler sentences: By 1998, over 95% of his canola crop was of the Roundup Ready variety. Schemeiser claimed that, at no point did he use use any Roundup herbicide on his crops.