( ( Mars ( ( The ( fourth planet ) ) ( from ( the sun ) ) ) ) . )
(ROOT (NP (NP (NNP Mars)) (NP (NP (DT The) (JJ fourth) (NN planet)) (PP (IN from) (NP (DT the) (NN sun)))) (. .)))
Mars The fourth planet from the sun.
(ROOT (S (NP (NNP Mars)) (VP (VBZ is) (NP (NP (DT the) (JJ fourth) (NN planet)) (PP (IN from) (NP (DT the) (NN sun))))) (. .)))