Complex sentence: When Valentin arrives in London, he tries to tail Father Brown, but loses him, later that day, retracing his steps, he comes across a very elegant restaraunt, whose plate-glass window has a huge star shaped hole in it.
Split into simpler sentences: When Valentin arrives in London, he tries to tail Father Brown, but loses him. Later that day, retracing his steps, he comes across a very elegant restaurant, whose plate-glass window has a huge star shaped hole in it.