He heard the tractors and bulldozers moving along the narrow cliff above him, but he was used to the sound.
He was used to the noise of the bulldozers and tractors moving along the cliff above him.
mnli hypothesis: He was used to the noise of the bulldozers and tractors moving along the cliff above him. premise: He heard the tractors and bulldozers moving along the narrow cliff above him, but he was used to the sound.