Complex sentence: Sightings have been logged since 1345 and continue into the 21st century including a 2012 video supposedly showing the creature swimming, and an origin of the creature is given in Jón Árnason's collection of Icelandic folktales and legends published in 1862 and 1864.
Split into simpler sentences: Sightings have been logged since 1345 and continue into the 21st century, including a 2012 video supposedly showing the creature swimming. An origin of the creature is given in Jón Árnason's collection of Icelandic folktales and legends published in 1862 and 1864.