Luis Alonso, Luis Alonso, says to him, Luis Alonso's friend.
( ( ( ( ( Luis Alonso ) , ) ( Luis Alonso ) ) , ) ( ( says ( to ( ( him , ) ( ( Luis ( Alonso 's ) ) friend ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Luis) (NNP Alonso)) (, ,) (NP (NNP Luis) (NNP Alonso)) (, ,)) (VP (VBZ says) (PP (TO to) (NP (NP (PRP him)) (, ,) (NP (NP (NNP Luis) (NNP Alonso) (POS 's)) (NN friend))))) (. .)))
They have known Luis for many years.
( They ( ( have ( known ( Luis ( for ( many years ) ) ) ) ) . ) )
(ROOT (S (NP (PRP They)) (VP (VBP have) (VP (VBN known) (NP (NP (NNP Luis)) (PP (IN for) (NP (JJ many) (NNS years)))))) (. .)))