We have a question from the game mind trap, the answer space ws missing, please see the details for the ques.?

before airplanes were invented a suspension bridge was beign planed to span the george near niagara falls there was no way a boat could carry the necessary cables across teh water teh bridge could not be built untill teh cables span the river one day teh buiders stages a contest open to teh public that solved their problem, the contest was won by a young boy shorthy there after teh cables spaned teh water what contest did they stage and how did they use it to solve their problem?