Did Meriwether Lewis really commit suicide, as historians claim?
( ( ( Did ( Meriwether Lewis ) ) ( really ( commit ( ( suicide , ) ( as ( historians claim ) ) ) ) ) ) ? )
(ROOT (SQ (VBD Did) (NP (NNP Meriwether) (NNP Lewis)) (VP (ADVP (RB really)) (VB commit) (NP (NP (NN suicide)) (, ,) (SBAR (IN as) (S (NP (NNS historians)) (VP (VBP claim)))))) (. ?)))
Historians often claim that Meriwether Lewis was killed by natives.
( Historians ( often ( ( claim ( that ( ( Meriwether Lewis ) ( was ( killed ( by natives ) ) ) ) ) ) . ) ) )
(ROOT (S (NP (NNS Historians)) (ADVP (RB often)) (VP (VBP claim) (SBAR (IN that) (S (NP (NNP Meriwether) (NNP Lewis)) (VP (VBD was) (VP (VBN killed) (PP (IN by) (NP (NNS natives)))))))) (. .)))