Complex sentence: In December 2013, Couric ran a segment on the HPV vaccine, which critics accused of being too sympathetic to the scientifically unsupported claims that this vaccine was dangerous, for example, Seth Mnookin accused her broadcast of employing false balance.
Split into simpler sentences: In December 2013, Couric ran a segment on the HPV vaccine which critics accused of being too sympathetic to the scientifically unsupported claims that this vaccine was dangerous. For example, Seth Mnookin accused her broadcast of employing false balance.