an Entity references as follows:
SS D.M. Clemson was a 468-foot (143 m) long steel-hulled Great Lakes freighter that went missing on 1 December 1908, on Lake Superior. The ship was last seen coming through the Soo Locks, onto Lake Superior. The ship was built in 1903 for the Provident Steamship Company. She is known for sinking on Lake Superior, on the night of 1 December 1908 with all hands; 24 men lost their lives. The wreck of D.M. Clemson is still missing, and the cause of her sinking remains a mystery to this day.