( ( ( ( ( ( MARS Mars ) , ) ( the ( `` ( red planet ) ) ) ) , ) '' ) ( ( is ( ( the ( fourth planet ) ) ( from ( the sun ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP MARS) (NNP Mars)) (, ,) (NP (DT the) (`` ``) (JJ red) (NN planet)) (, ,) ('' '')) (VP (VBZ is) (NP (NP (DT the) (JJ fourth) (NN planet)) (PP (IN from) (NP (DT the) (NN sun))))) (. .)))
MARS Mars, the &quot;red planet,&quot; is 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))))) (. .)))