Their actions saved the lives of countless others, and may have saved either the Capitol or the White House from destruction.
( ( Their actions ) ( ( ( ( ( saved ( ( the lives ) ( of ( countless others ) ) ) ) , ) and ) ( may ( have ( ( saved ( either ( ( ( the Capitol ) or ) ( the ( White House ) ) ) ) ) ( from destruction ) ) ) ) ) . ) )
(ROOT (S (NP (PRP$ Their) (NNS actions)) (VP (VP (VBD saved) (NP (NP (DT the) (NNS lives)) (PP (IN of) (NP (JJ countless) (NNS others))))) (, ,) (CC and) (VP (MD may) (VP (VB have) (VP (VBN saved) (PP (CC either) (NP (NP (DT the) (NNP Capitol)) (CC or) (NP (DT the) (NNP White) (NNP House)))) (PP (IN from) (NP (NN destruction))))))) (. .)))
They saved lives with what they were doing.
( They ( ( ( saved lives ) ( with ( what ( they ( were doing ) ) ) ) ) . ) )
(ROOT (S (NP (PRP They)) (VP (VBD saved) (NP (NNS lives)) (PP (IN with) (SBAR (WHNP (WP what)) (S (NP (PRP they)) (VP (VBD were) (VP (VBG doing))))))) (. .)))