( ( Except ( for ( ( Mercury and ) Venus ) ) ) ( , ( ( all planets ) ( ( have satellites ) . ) ) ) )
(ROOT (S (PP (IN Except) (PP (IN for) (NP (NNP Mercury) (CC and) (NNP Venus)))) (, ,) (NP (DT all) (NNS planets)) (VP (VBP have) (NP (NNS satellites))) (. .)))
Except for Mercury and Venus, all planets have satellites.
(ROOT (S (NP (NNP Venus)) (VP (VBZ has) (NP (DT the) (JJS most) (NNS volcanoes))) (. .)))