. "Clay trotting horses were an American strain of trotting horse during the 19th century that is no longer existent, but has descendants in the Standardbred."@en . . . . . . . . . . . "24406941"^^ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "5381"^^ . "1115753780"^^ . . . . . "Clay trotting horses were an American strain of trotting horse during the 19th century that is no longer existent, but has descendants in the Standardbred."@en . . "Clay Trotting Horses"@en . . . . . .