( ( ( Io and ) ( ( the ( Earth 's ) ) moon ) ) ( ( have ( a ( vital difference ) ) ) . ) )
(ROOT (S (NP (NP (NNP Io)) (CC and) (NP (NP (DT the) (NN Earth) (POS 's)) (NN moon))) (VP (VBP have) (NP (DT a) (JJ vital) (NN difference))) (. .)))
Io and the Earth's moon have a vital difference.
(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)))))) (. .)))