( ( The ( planets ( ( Jupiter and ) Venus ) ) ) ( ( have ( been neighbours ) ) ; ) )
(ROOT (S (NP (DT The) (NNP planets) (NNP Jupiter) (CC and) (NNP Venus)) (VP (VBP have) (VP (VBN been) (NP (NNS neighbours)))) (: ;)))
The planets Jupiter and Venus have been neighbours;
(ROOT (S (NP (NNP Venus)) (VP (VBZ has) (NP (DT the) (JJS most) (NNS volcanoes))) (. .)))