Visigoths sack Rome
( Visigoths ( sack Rome ) )
(ROOT (NP (NNP Visigoths) (NNP sack) (NNP Rome)))
Rome was invaded by the Visigoths.
( Rome ( ( was ( invaded ( by ( the Visigoths ) ) ) ) . ) )
(ROOT (S (NP (NNP Rome)) (VP (VBD was) (VP (VBN invaded) (PP (IN by) (NP (DT the) (NNPS Visigoths))))) (. .)))