Complex sentence: During that session, BBC Scotland director Ken MacQuarrie disputed the findings of Dr Robertson's study, saying that its conclusions were largely based upon "flawed analysis" and had contained factual errors.
Split into simpler sentences: During that session, BBC Scotland director Ken MacQuarrie disputed the findings of Dr Robertson's study. MacQuarrie criticised its methodology, saying that its conclusions were largely based upon "flawed analysis" and contained factual errors.