His marriage, Sears guessed, would have been unsuccessful and his children would have difficulty finding themselves.
( ( ( ( ( ( ( ( His marriage ) , ) ( Sears guessed ) ) , ) ( would ( have ( been unsuccessful ) ) ) ) and ) ( ( his children ) ( would ( have ( difficulty ( finding themselves ) ) ) ) ) ) . )
(ROOT (S (S (NP (NP (PRP$ His) (NN marriage)) (, ,) (NP (NNP Sears) (NNP guessed)) (, ,)) (VP (MD would) (VP (VB have) (VP (VBN been) (ADJP (JJ unsuccessful)))))) (CC and) (S (NP (PRP$ his) (NNS children)) (VP (MD would) (VP (VB have) (NP (NP (NN difficulty)) (VP (VBG finding) (NP (PRP themselves))))))) (. .)))
The couple argued a lot. 
( ( The couple ) ( ( argued ( a lot ) ) . ) )
(ROOT (S (NP (DT The) (NN couple)) (VP (VBD argued) (NP (DT a) (NN lot))) (. .)))