( ( In ( November 1980 ) ) ( , ( ( the ( Voyager ( 1 probe ) ) ) ( ( visited ( the ( Saturn system ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (NNP November) (CD 1980))) (, ,) (NP (DT the) (NNP Voyager) (CD 1) (NN probe)) (VP (VBD visited) (NP (DT the) (NNP Saturn) (NN system))) (. .)))
In November 1980, the Voyager 1 probe visited the Saturn system.
(ROOT (S (NP (DT The) (NN voyager) (CD 1) (NN spacecraft)) (VP (VBD visited) (NP (NN saturn)) (PP (IN in) (NP (CD 1980)))) (. .)))