The day may well come, as Barlow and Dyson seem to believe, when book publishers as we know them will disappear.
( ( The day ) ( ( ( may well ) ( ( ( ( come , ) ( as ( ( ( Barlow and ) Dyson ) ( seem ( to believe ) ) ) ) ) , ) ( when ( ( ( book publishers ) ( as we ) ) ( know ( them ( will disappear ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN day)) (VP (MD may) (ADVP (RB well)) (VP (VB come) (, ,) (SBAR (IN as) (S (NP (NNP Barlow) (CC and) (NNP Dyson)) (VP (VBP seem) (S (VP (TO to) (VP (VB believe))))))) (, ,) (SBAR (WHADVP (WRB when)) (S (NP (NP (NN book) (NNS publishers)) (PP (IN as) (NP (PRP we)))) (VP (VBP know) (SBAR (S (NP (PRP them)) (VP (MD will) (VP (VB disappear)))))))))) (. .)))
Barlow and Dyson believe that book publishers may disappear.
( ( ( Barlow and ) Dyson ) ( ( believe ( that ( ( book publishers ) ( may disappear ) ) ) ) . ) )
(ROOT (S (NP (NNP Barlow) (CC and) (NNP Dyson)) (VP (VBP believe) (SBAR (IN that) (S (NP (NN book) (NNS publishers)) (VP (MD may) (VP (VB disappear)))))) (. .)))