( ( the ( elliptical lines ) ) ( ( ( represent ( equal ( probability contours ) ) ) ( in ( the ( two ( dimensional ( feature space ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT the) (JJ elliptical) (NNS lines)) (VP (VBP represent) (NP (JJ equal) (NN probability) (NNS contours)) (PP (IN in) (NP (DT the) (CD two) (JJ dimensional) (NN feature) (NN space)))) (. .)))
the elliptical lines represent equal probability contours in the two dimensional feature space.
(ROOT (S (NP (NNP Contour) (NNS lines)) (VP (VBP show) (NP (NP (DT the) (JJ three-dimensional) (NN shape)) (PP (IN of) (NP (NN land))))) (. .)))