( Falls ( ( was ( ( ( added ( in 1896 ) ) , ) ( when ( ( a dam ) ( ( converted ( ( a series ) ( of rapids ) ) ) ( to ( a waterfall ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Falls)) (VP (VBD was) (VP (VBN added) (PP (IN in) (NP (CD 1896))) (, ,) (SBAR (WHADVP (WRB when)) (S (NP (DT a) (NN dam)) (VP (VBD converted) (NP (NP (DT a) (NN series)) (PP (IN of) (NP (NNS rapids)))) (PP (TO to) (NP (DT a) (NN waterfall)))))))) (. .)))
Falls was added in 1896, when a dam converted a series of rapids to a waterfall.
(ROOT (S (NP (NNP Iguassu) (NNP falls)) (VP (VBZ is) (NP (NP (DT the) (JJS largest) (NN waterfall)) (PP (IN on) (NP (DT the) (NN planet))))) (. .)))