Complex sentence: Arthur and Beryl Crabtree had raised four children and looked forward to the day when their time once again would be their own; a second honeymoon was planned as the last of their offspring finally left home.
Split into simpler sentences: Arthur and Beryl Crabtree had raised four children and looked forward to the day when their time, once again would be their own. A second honeymoon was planned as the last of their offspring finally left home.