( ( ( The ( dust tail ) ) ( trailing ( ( the ( comet 's ) ) nucleus ) ) ) ( ( is ( the ( most prominent ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN dust) (NN tail)) (VP (VBG trailing) (NP (NP (DT the) (NN comet) (POS 's)) (NN nucleus)))) (VP (VBZ is) (NP (DT the) (RBS most) (JJ prominent))) (. .)))
The dust tail trailing the comet's nucleus is the most prominent.
(ROOT (S (NP (JJ Comet) (NNS tails)) (VP (ADVP (RB always)) (VBP point) (PRT (RP away)) (PP (IN from) (NP (NP (DT the) (NN sun)) (PP (RB instead) (IN of) (S (VP (VBG trailing) (PP (IN behind) (NP (DT the) (ADJP (JJ comet) (PP (IN because) (NP (NN dust) (NNS particles)))) (NN recoil))))))))) (. .)))