( ( ( ( ( The ( three ( outer planets ) ) ) , ) ( Uranus ( , ( ( Neptune and ) Pluto ) ) ) ) , ) ( ( ( became ( the ( collective planet ) ) ) ( since ( they ( ( move ( ( so slowly ) rough ) ) ( the chart ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (CD three) (JJ outer) (NNS planets)) (, ,) (NP (NNP Uranus) (, ,) (NNP Neptune) (CC and) (NNP Pluto)) (, ,)) (VP (VBD became) (NP (DT the) (JJ collective) (NN planet)) (SBAR (IN since) (S (NP (PRP they)) (VP (VBP move) (ADJP (ADVP (RB so) (RB slowly)) (JJ rough)) (S (NP (DT the) (NN chart))))))) (. .)))
The three outer planets, Uranus, Neptune and Pluto, became the collective planet since they move so slowly rough the chart.
(ROOT (S (NP (NNS Uranus)) (VP (VBZ is) (NP (DT the) (ADJP (JJS least) (JJ massive)) (JJ outer) (NN planet))) (. .)))