Sentence:  It was not far from the house; but the ground sank into a depression there, and the ridge of it behind shut out everything except just the roof of the tallest hayrick. As one sat on the sward behind the elm, with the back turned on the rick and nothing in front but the tall elms and the <WSD>oaks</WSD> in the other hedge, it was quite easy to fancy it the verge of the prairie with the backwoods close by. 
Meaning of the word marked with <WSD> tags:  (tree)  A deciduous tree with distinctive deeply lobed leaves, acorns, and notably strong wood, typically of England and northeastern North America, included in genus "Quercus".