( ( ( Mars ( The ( fourth planet ) ) ) ( from ( the Sun ) ) ) ( , ( Mars ( ( ( is sometimes ) ( ( ( called ( the ( red planet ) ) ) , ) ( because ( of ( ( its ( reddish appearance ) ) ( as ( seen ( in ( a telescope ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (S (VP (VBG Mars) (NP (DT The) (JJ fourth) (NN planet)) (PP (IN from) (NP (DT the) (NNP Sun))))) (, ,) (NP (NNP Mars)) (VP (VBZ is) (ADVP (RB sometimes)) (VP (VBN called) (NP (DT the) (JJ red) (NN planet)) (, ,) (PP (RB because) (IN of) (NP (NP (PRP$ its) (JJ reddish) (NN appearance)) (SBAR (IN as) (S (VP (VBN seen) (PP (IN in) (NP (DT a) (NN telescope)))))))))) (. .)))
Mars The fourth planet from the Sun , Mars is sometimes called the red planet, because of its reddish appearance as seen in a telescope.
(ROOT (S (NP (NNP Mars)) (VP (VBZ is) (NP (NP (DT the) (JJ fourth) (NN planet)) (PP (IN from) (NP (DT the) (NN sun))))) (. .)))