Monsters have had starring roles in SF from its early years.
( Monsters ( ( have ( had ( ( starring ( roles ( in SF ) ) ) ( from ( its ( early years ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Monsters)) (VP (VBP have) (VP (VBN had) (S (VP (VBG starring) (NP (NP (NNS roles)) (PP (IN in) (NP (NNP SF)))) (PP (IN from) (NP (PRP$ its) (JJ early) (NNS years))))))) (. .)))
Monsters had bit parts in the halcyon days of SF.
( Monsters ( ( had ( ( bit parts ) ( in ( ( the ( halcyon days ) ) ( of SF ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Monsters)) (VP (VBD had) (NP (NP (NN bit) (NNS parts)) (PP (IN in) (NP (NP (DT the) (NN halcyon) (NNS days)) (PP (IN of) (NP (NNP SF))))))) (. .)))