( Authors ( ( ( differ ( as to ) ) ( ( ( whether ( ( such moons ) ( are ( considered ( to ( have atmospheres ) ) ) ) ) ) or ) not ) ) . ) )
(ROOT (S (NP (NNS Authors)) (VP (VBP differ) (ADVP (RB as) (PP (TO to))) (SBAR (IN whether) (S (NP (JJ such) (NNS moons)) (VP (VBP are) (VP (VBN considered) (S (VP (TO to) (VP (VB have) (NP (NNS atmospheres)))))))) (CC or) (RB not))) (. .)))
Authors differ as to whether such moons are considered to have atmospheres or not.
(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)))))) (. .)))