( ( ( Uranus 's ) mass ) ( ( ( ( is ( ( ( roughly ( 14.5 times ) ) that ) ( of ( the Earth ) ) ) ) , ) ( making ( it ( ( the ( least massive ) ) ( of ( the ( giant planets ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Uranus) (POS 's)) (NN mass)) (VP (VBZ is) (NP (NP (QP (RB roughly) (CD 14.5) (NNS times)) (DT that)) (PP (IN of) (NP (DT the) (NN Earth)))) (, ,) (S (VP (VBG making) (S (NP (PRP it)) (NP (NP (DT the) (JJS least) (JJ massive)) (PP (IN of) (NP (DT the) (JJ giant) (NNS planets)))))))) (. .)))
Uranus's mass is roughly 14.5 times that of the Earth, making it the least massive of the giant planets.
(ROOT (S (NP (NNS Uranus)) (VP (VBZ is) (NP (DT the) (ADJP (JJS least) (JJ massive)) (JJ outer) (NN planet))) (. .)))