sentences:  The firemen had been distracted by a problem with the engines lubricator, and missed that they did not have "all clear" signals through Marienborg.The train manager in the first carriage was also supposed to look out for a manual signal by the station guard as they passed through Marienborg, but he had some trouble with opening and closing the window, and in the seconds lost fumbling with it, he failed to notice that there was no guardsman there.The driver did notice a jolt as the train drove against the points as they left the station, and slowed slightly to figure out what was going on.