Tell me, how did those scribbled words on the envelope help you to discover that a will was made yesterday afternoon?" Poirot smiled. 
( ( ( ( ( Tell me ) , ) ( how ( did ( those ( ( ( ( scribbled words ) ( on ( the envelope ) ) ) ( help ( you ( to ( discover ( that ( ( a will ) ( was ( made yesterday ) ) ) ) ) ) ) ) ) afternoon ) ) ) ) ) ? ) ( '' ( Poirot ( smiled . ) ) ) )
(ROOT (S (SQ (VP (VB Tell) (NP (PRP me)) (, ,) (SBAR (WHADVP (WRB how)) (S (VP (VBD did) (SBAR (S (NP (DT those)) (VP (VBD scribbled) (NP (NNS words)) (PP (IN on) (NP (DT the) (NN envelope))) (S (VP (VB help) (S (NP (PRP you)) (VP (TO to) (VP (VB discover) (SBAR (IN that) (S (NP (DT a) (NN will)) (VP (VBD was) (VP (VBN made) (NP (NN yesterday))))))))))) (NP (NN afternoon))))))))) (. ?)) ('' '') (NP (NNP Poirot)) (VP (VBD smiled)) (. .)))
How did you work out from that text that there was a new will?
( How ( ( ( did you ) ( ( ( work out ) ( from ( that text ) ) ) ( that ( there ( was ( a ( new will ) ) ) ) ) ) ) ? ) )
(ROOT (SBARQ (WHADVP (WRB How)) (SQ (VBD did) (NP (PRP you)) (VP (VB work) (PRT (RP out)) (PP (IN from) (NP (DT that) (NN text))) (SBAR (IN that) (S (NP (EX there)) (VP (VBD was) (NP (DT a) (JJ new) (NN will))))))) (. ?)))