Complex sentence: "Come, all ye jolly tinner boys" is a traditional folk song associated with Cornwall that was written about 1807, when Napoleon Bonaparte made threats that would affect trade in Cornwall at the time of the invasion of Poland.
Split into simpler sentences: Come, all ye jolly Tinner boys is a traditional folk song associated with Cornwall. Written in about 1807, when Napoleon Bonaparte made threats that would affect trade in Cornwall at the time of the invasion of Poland.