Still, it would be interesting to know. 109 Poirot looked at me very earnestly, and again shook his head. 
( Still ( ( , ( it ( ( would ( be ( interesting ( to know ) ) ) ) . ) ) ) ( ( 109 Poirot ) ( ( ( ( ( looked ( at ( me ( very earnestly ) ) ) ) , ) and ) ( again ( shook ( his head ) ) ) ) . ) ) ) )
(ROOT (S (ADVP (RB Still)) (PRN (, ,) (SINV (NP (PRP it)) (VP (MD would) (VP (VB be) (ADJP (JJ interesting) (S (VP (TO to) (VP (VB know))))))) (. .))) (NP (NNP 109) (NNP Poirot)) (VP (VP (VBD looked) (PP (IN at) (NP (NP (PRP me)) (ADJP (RB very) (JJ earnestly))))) (, ,) (CC and) (VP (ADVP (RB again)) (VBD shook) (NP (PRP$ his) (NN head)))) (. .)))
Poirot was disappointed with me.
( Poirot ( ( was ( disappointed ( with me ) ) ) . ) )
(ROOT (S (NP (NNP Poirot)) (VP (VBD was) (VP (VBN disappointed) (PP (IN with) (NP (PRP me))))) (. .)))