Complex sentence: Räikkönen had a terrible race from the start after Kevin Magnussen's McLaren clipped his front tyre, causing a puncture he ultimately finished twelfth behind the Lotus of Romain Grosjean.
Split into simpler sentences: Räikkönen had a terrible race from the start after Kevin Magnussen's McLaren clipped his front tyre, causing a puncture. He ultimately finished twelfth behind the Lotus of Romain Grosjean.