Niagara Scow
The Niagara Scow ( also called the Old Scow or Iron Scow ) is the unofficial name of the wreck of a small scow that brought two men perilously close to plunging over the Horseshoe Falls , the largest of the Niagara Falls , in 1918 . 
<triplet> Niagara Scow <subj> wreck <obj> instance of