Earth to Marvin.
( ( Earth ( to Marvin ) ) . )
(ROOT (NP (NP (NNP Earth)) (PP (TO to) (NP (NNP Marvin))) (. .)))
Marvin pay attention.
( Marvin ( ( pay attention ) . ) )
(ROOT (S (NP (NNP Marvin)) (VP (VBP pay) (NP (NN attention))) (. .)))