( Titan ( ( is ( ( the ( largest moon ) ) ( of ( ( Saturn , ) ( ( a moon ) ( that ( ( ( ( is ( ( almost ( the size ) ) ( of Mars ) ) ) , ) and ) ( ( has ( ( an ( atmosphere ( 1.5 times ) ) ) as ) ) ( dense ( as ( Earth 's ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Titan)) (VP (VBZ is) (NP (NP (DT the) (JJS largest) (NN moon)) (PP (IN of) (NP (NP (NNP Saturn)) (, ,) (NP (NP (DT a) (NN moon)) (SBAR (WHNP (WDT that)) (S (VP (VP (VBZ is) (NP (NP (RB almost) (DT the) (NN size)) (PP (IN of) (NP (NNP Mars))))) (, ,) (CC and) (VP (VBZ has) (ADVP (NP (DT an) (NN atmosphere) (QP (CD 1.5) (NNS times))) (RB as)) (VP (VBN dense) (PP (IN as) (NP (NNP Earth) (POS 's))))))))))))) (. .)))
Titan is the largest moon of Saturn, a moon that is almost the size of Mars, and has an atmosphere 1.5 times as dense as Earth's.
(ROOT (S (NP (CD One) (NN way) (SBAR (IN that) (S (NP (DT the) (NN moon)) (VP (VBZ is) (ADJP (JJ different) (PP (IN from) (NP (NN earth)))))))) (VP (VBZ is) (SBAR (IN that) (S (NP (DT the) (NN moon)) (VP (VBZ has) (NP (RB almost) (DT no) (NN atmosphere)))))) (. .)))