( ( ( ( ( ( ( ( Voyager ( Spacecraft Launched ) ) ( in ( ( August and ) September ) ) ) ( of ( 1977 ( ( ( the ( Voyager 1 ) ) and ) ( 2 spacecraft ) ) ) ) ) ( ( were each ) ( originally ( ( planned ( for visits ) ) ( to ( ( ( ( ( the ( planets Jupiter ) ) ( -LRB- ( 1979 -RRB- ) ) ) and ) Saturn ) ( -LRB- ( ( in ( ( 1980 and ) 1981 ) ) -RRB- ) ) ) ) ) ) ) ) , ) but ) ( ( after ( those ( successful encounters ) ) ) ( ( Voyager 2 ) ( was ( ( sent ( to ( ( Uranus and ) Neptune ) ) ) ( in ( the ( late ( 1980 's ) ) ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (NP (NNP Voyager) (NNP Spacecraft) (NNP Launched)) (PP (IN in) (NP (NNP August) (CC and) (NNP September))) (PP (IN of) (NP (CD 1977) (NP (DT the) (NNP Voyager) (CD 1)) (CC and) (NP (CD 2) (NN spacecraft))))) (VP (VBD were) (DT each) (VP (ADVP (RB originally)) (VBN planned) (PP (IN for) (NP (NNS visits))) (PP (TO to) (NP (NP (DT the) (NNP planets) (NNP Jupiter)) (PRN (-LRB- -LRB-) (NP (CD 1979)) (-RRB- -RRB-)) (CC and) (NP (NNP Saturn)) (PRN (-LRB- -LRB-) (PP (IN in) (NP (CD 1980) (CC and) (CD 1981))) (-RRB- -RRB-))))))) (, ,) (CC but) (S (PP (IN after) (NP (DT those) (JJ successful) (NNS encounters))) (NP (NNP Voyager) (CD 2)) (VP (VBD was) (VP (VBN sent) (PP (TO to) (NP (NNP Uranus) (CC and) (NNP Neptune))) (PP (IN in) (NP (DT the) (JJ late) (CD 1980) (NNS 's)))))) (. .)))
Voyager Spacecraft Launched in August and September of 1977 the Voyager 1 and 2 spacecraft were each originally planned for visits to the planets Jupiter (1979) and Saturn (in 1980 and 1981), but after those successful encounters Voyager 2 was sent to Uranus and Neptune in the late 1980's.
(ROOT (S (NP (DT The) (NN voyager) (CD 1) (NN spacecraft)) (VP (VBD visited) (NP (NN saturn)) (PP (IN in) (NP (CD 1980)))) (. .)))